Posts Tagged ‘find’

How to count number of ESTABLISHED state TCP connections to a Windows server

Wednesday, March 13th, 2024


Even if you have the background of a Linux system administrator, sooner or later you will have have to deal with some Windows hosts, thus i'll blog in this article shortly on how the established TCP if it happens you will have to administarte a Windows hosts or help a windows sysadmin noobie 🙂

In Linux it is pretty easy to check the number of established conenctions, because of the wonderful command wc (word count). with a simple command like:

$ netstat -etna |wc -l

Then you will get the number of active TCP connections to the machine and based on that you can get an idea on how busy the server is.

But what if you have to deal with lets say a Microsoft Windows 2012 /2019 / 2020 or 2022 Server, assuming you logged in as Administrator and you see the machine is quite loaded and runs multiple Native Windows Administrator common services such as IIS / Active directory Failover Clustering, Proxy server etc.
How can you identify the established number of connections via a simple command in cmd.exe?

1.Count ESTABLISHED TCP connections from Windows Command Line

Here is the answer, simply use netstat native windows command and combine it with find, like that and use the /i (ignores the case of characters when searching the string) /c (count lines containing the string) options

C:\Windows\system32>netstat -p TCP -n|  find /i "ESTABLISHED" /c

Voila, here are number of established connections, only 1268 that is relatively low.
However if you manage Windows servers, and you get some kind of hang ups as part of the monitoring, it is a good idea to setup a script based on this simple command for at least Windows Task Scheduler (the equivallent of Linux's crond service) to log for Peaks in Established connections to see whether Server crashes are not related to High Rise in established connections.
Even better if company uses Zabbix / Nagios, OpenNMS or other  old legacy monitoring stuff like Joschyd even as of today 2024 used in some big of the TOP IT companies such as SAP (they were still using it about 4 years ago for their SAP HANA Cloud), you can set the script to run and do a Monitoring template or Alerting rules to draw you graphs and Trigger Alerts if your connections hits a peak, then you at least might know your Windows server is under a "Hackers" Denial of Service attack or there is something happening on the network, like Cisco Network Infrastructure Switch flappings or whatever.

Perhaps an example script you can use if you decide to implement the little nestat established connection checks Monitoring in Zabbix is the one i've writen about in the previous article "Calculate established connection from IP address with shell script and log to zabbix graphic".

2. Few Useful netstat options for the Windows system admin

C:\Windows\System32> netstat -bona


Cmd.exe will lists executable files, local and external IP addresses and ports, and the state in list form. You immediately see which programs have created connections or are listening so that you can find offenders quickly.

b – displays the executable involved in  creating the connection.
o – displays the owning process ID.
n – displays address and port numbers.
a – displays all connections and listening ports.

As you can see in the screenshot, by using netstat -bona you get which process has binded to which local address and the Process ID PID of it, that is pretty useful in debugging stuff.

3. Use a Third Party GUI tool to debug more interactively connection issues

If you need to keep an eye in interactive mode, sometimes if there are issues CurrPorts tool can be of a great help


CurrPorts Tool own Description

CurrPorts is network monitoring software that displays the list of all currently opened TCP/IP and UDP ports on your local computer. For each port in the list, information about the process that opened the port is also displayed, including the process name, full path of the process, version information of the process (product name, file description, and so on), the time that the process was created, and the user that created it.
In addition, CurrPorts allows you to close unwanted TCP connections, kill the process that opened the ports, and save the TCP/UDP ports information to HTML file , XML file, or to tab-delimited text file.
CurrPorts also automatically mark with pink color suspicious TCP/UDP ports owned by unidentified applications (Applications without version information and icons).

Sum it up

What we learned is how to calculate number of established TCP connections from command line, useful for scripting, how you can use netstat to display the process ID and Process name that relates to a used Local / Remote TCP connections, and how eventually you can use this to connect it to some monitoring tool to periodically report High Peaks with TCP established connections (usually an indicator of servere system issues).

Analyze disk space usage in Linux / BSD with du / find and filelight /qdirstat / baobab GUI disk usage analyzers to check what takes up your disk space on Unix like OSes

Friday, April 21st, 2023


If you're a Desktop Linux or BSD UNIX user and your hard disk / external SSD / flash drive etc. space starts to be misteriously disapper due to whatever reaseon such as a crashing applications producing rapidly log error / warning messages leading quickly to filling up the disk or out of a sudden you have some Disk space lost without knowing what kind of data filled up the disk or you're downloading some big sized bittorrent files forgotten in your bittorrent client or complete mirroring a large website and you suddenly get the result of root directory ( / ) getting fully or nearly filled up, then you definitely would want to check out what has disk activity has eaten up your disk space and leaing to OS and Aplication slow responsiveness.

For the Linux regular *nix user finding out what is filling the disk is a trivial task with with find / du -hsc * but as people have different habits to use find and du I'll show you the most common ways I use this two command line tools to identify disk space low issues for the sake of comparison.
Others who have better easier ways to do it are very welcome to share it with me in the comments.

1. Finding large files on hard disk with find Linux command tool

host:~# find /home -type f -printf "%s\t%p\n" | sort -n | tail -10
2100000000    /home/hipo/Downloads/MameUIfx incl. ROMs/MameUIfx incl. ROMs-6.bin
2100000000    /home/hipo/Downloads/MameUIfx incl. ROMs/MameUIfx incl. ROMs-7.bin
2100000000    /home/hipo/Downloads/MameUIfx incl. ROMs/MameUIfx incl. ROMs-8.bin
2100000000    /home/hipo/Downloads/MameUIfx incl. ROMs/MameUIfx incl. ROMs-9.bin
2815424080    /home/hipo/.thunderbird/h3dasfii.default\
2925584895    /home/hipo/Documents/.git/\
4336918067    /home/hipo/Games/Mames_4GB-compilation-best-arcade-games-of-your-14_04_2021.tar.gz
6109003776    /home/hipo/VirtualBox VMs/CentOS/CentOS.vdi
23599251456    /home/hipo/VirtualBox VMs/Windows 7/Windows 7.vdi
33913044992    /home/hipo/VirtualBox VMs/Windows 10/Windows 10.vdi

I use less rarely find on Desktops and more when I have to do some kind of data usage analysis on servers, of course for my Linux home computer and any other Linux desktop machines, or just a small incomprehensive analysis du cmd is much more appropriate to use.

2. Finding large files Megabyte occupying space files sorted in Megabytes and Gigas with du

  • Check main 10 files sorted in megabytes that are hanging in a directory

pcfkreak:~# du -hsc /home/hipo/*|grep 'M\s'|sort -rn|head -n 10
956M    /home/hipo/last_dump1.sql
711M    /home/hipo/hipod
571M    /home/hipo/from-thinkpad_r61
453M    /home/hipo/ultimate-edition-themes
432M    /home/hipo/metasploit-framework
355M    /home/hipo/output-upgrade.txt
333M    /home/hipo/Плот
209M    /home/hipo/Work-New.tar.gz
98M    /home/hipo/DOOM64
90M    /home/hipo/mp3

  • Get 10 top larges files in Gigabytes that are space hungry and eating up your space

pcfkreak:~# du -hsc /home/hipo/*|grep 'G\s'|sort -rn|head -n 10
156G    total
60G    /home/hipo/VirtualBox VMs
37G    /home/hipo/Downloads
18G    /home/hipo/Desktop
11G    /home/hipo/Games
7.4G    /home/hipo/ownCloud
7.1G    /home/hipo/Документи
4.6G    /home/hipo/music
2.9G    /home/hipo/root
2.8G    /home/hipo/Documents

If you want to still work on the console terminal but you don't want to type too much you can use ncdu (ncurses) text tool, install it with

# apt install –yes ncdu

 For the most lazy ones or complete Linux newbies that doesn't want to spend time typing / learing or using text commands or softwares you can also check what has eaten up your full disk space with GUI tools as well.

There are at least 3 tools to use to check in Graphical Interface what has occupied your disk space on Linux / BSD, I'm aware of:

3. Filelight GUI disk usage analysis Linux tool

For those using KDE or preferring a shiny GUI interface that will capture the eye, perhaps filelight would be the option of choice tool to get analysis sum of your directory sturctures and file use on the laptop or desktop *unix OS.

unix-desktop:~# apt-cache show filelight|grep -i description-en -A 7
Description-en: show where your diskspace is being used
 Filelight allows you to understand your disk usage by graphically
 representing your filesystem as a set of concentric, segmented rings.
 It is like a pie-chart, but the segments nest, allowing you to see both
 which directories take up all your space, and which directories
 and files inside those directories are the real culprits.
Description-md5: 397ff9a469e07a772f22460c66b66875

To use it simply go ahead and install it with apt or yum / dnf or whatever Linux package manager your distro uses:

unix-desktop:~# apt-get install –yes filelight


4. GNOME DIsk Usage Analyzer Baobab GUI tool

For those being a GNOME / Mate / Budgie / Cinnamon Graphical interface users baobab shold be the program to use as it uses the famous LibGD library.

unix-desktop:~# apt-cache show baobab|grep -i description-en -A10
Description-en: GNOME disk usage analyzer
 Disk Usage Analyzer is a graphical, menu-driven application to analyse
 disk usage in a GNOME environment. It can easily scan either the whole
 filesystem tree, or a specific user-requested directory branch (local or
 It also auto-detects in real-time any changes made to your home
 directory as far as any mounted/unmounted device. Disk Usage Analyzer
 also provides a full graphical treemap window for each selected folder.
Description-md5: 5f6072b89ebb1dc83433fa7658814dc6



5. Qdirstat graphical application to show where your disk space has gone on Linux

Qdirstat is perhaps well known tool to track disk space issues on Linux desktop hosts, known by the hardcore KDE / LXDE / LXQT / DDE GUI interface / environment lovers and as a KDE tool uses the infamous Qt library. I personally don't like it and don't put it on machines I use because I never use kde and don't want to waste my disk space with additional libraries such as the QT Library which historically was not totally free in terms of licensing and even now is in both free and non free licensing GPL / LGPL and QT Commercial Licensing license.

unix-desktop:~# apt-cache show qdirstat|grep -i description-en -A10
Description-en: Qt-based directory statistics
 QDirStat is a graphical application to show where your disk space has gone and
 to help you to clean it up.
 QDirStat has a number of new features compared to KDirStat. To name a few:
  * Multi-selection in both the tree and the treemap.
  * Unlimited number of user-defined cleanup actions.
  * Properly show errors of cleanup actions (and their output, if desired).
  * File categories (MIME types) and their treemap color are now configurable.
  * Exclude rules for directories are easily configurable.
  * Desktop-agnostic; no longer relies on KDE or any other specific desktop.


That shiny fuzed graphics is actually a repsesantation of all directories the bigger and if one scrolls on the colorful gamma a text with directory and size or file will appear. Though the graphical represantation is really c00l to me it is a bit unreadable, thus I prefer and recommend the other two GUI tools filelight or baobab instead.

6. Finding duplicate files on Linux system with duff command tool

Talking about big unknown left-over files on your hard drives, it is appropriate to mention one tool here that is a console one but very useful to anyone willing to get rid of old duplicate files that are hanging around on the disk. Sometimes such copies are produced while copying large amount of files from place to place or simply by mistake while copying Photo / Video files from your Smart Phone to Linux desktop etc. 

This is where the duff command line utility might be super beneficial for you.

unix-desktop:~# apt-cache show duff|grep -i description-en -A3
Description-en: Duplicate file finder
 Duff is a command-line utility for identifying duplicates in a given set of
 files.  It attempts to be usably fast and uses the SHA family of message
 digests as a part of the comparisons.

Using duff tool is very straight forward to see all the duplicate files hanging in a directory lets say your home folder.

unix-desktop:~#  duff -rP /home/hipo

/home/hipo/music/var/Quake II Soundtrack – Kill Ratio.mp3
/home/hipo/mp3/Quake II Soundtrack – Kill Ratio.mp3
2 files in cluster 44 (7913472 bytes, digest 98f38be49e2ffcbf90927f9357b3e24a81d5a649)
2 files in cluster 45 (2807808 bytes, digest ce9067ce1f132fc096a5044845c7fac73e99c0ed)
/home/hipo/music/var/Quake II Suondtrack – March Of The Stoggs.mp3
/home/hipo/mp3/Quake II Suondtrack – March Of The Stoggs.mp3
2 files in cluster 46 (3506176 bytes, digest efcc401b4ebda9b0b2367aceb8e334c8ba1a357d)
/home/hipo/music/var/Quake II Suondtrack – Quad Machine.mp3
/home/hipo/mp3/Quake II Suondtrack – Quad Machine.mp3
2 files in cluster 47 (7917568 bytes, digest 0905c1d790654016c2ecf2949f78d47a870c3822)
/home/hipo/music/var/Cyberpunk Group – Futureshock!.mp3
/home/hipo/mp3/Cyberpunk Group – Futureshock!.mp3

-r (Recursively search into all specified directories.)

P (Don't follow any symbolic links.  This overrides any previous -H or -L option.  This is the default.  Note that this only applies to directories, as sym‐
             bolic links to files are never followed.)

7. Deleting duplicate files with duff

If you're absolutely sure you know what you're doing and you have a backup in case if something messes up during duplicate teletions, to get rid of lets say any duplicate Picture files found by duff run sommething like:

# duff -e0 -r /home/hipo/Pictures/ | xargs -0 rm

!!! Please note that using duff is for those who absolutely know what they're doing and have their data recent data. Deleting the wrong data by mistake with the tool might put you in the first grade and you'll be the only one to blame  🙂 !!!

Wrap it Up

Filling up the disk with unknown large files is a task to resolve that happens often. For the unlazy on Linux / BSD / Mac OS and other UNIX like OS-es the easiest way is to use find or du with some one liner command. For the lazy Windows addicted Graphical users filelightqdirstat or baobab GUI disk usage analysis tools are there.
If you have a lot of files and many of thems are duplicates you can use duff to check them out and remove all unneded duplicates and save space. 
Hope this article, was helpful for someone.
That's all folks, enjoy your data profilactics, if you know any other good easy command or GUI tools or hints for drive disk space profilactics please share.

Happy Nativity Christ is Born ! Happy New Year 2022 and thanks for reading me

Wednesday, January 5th, 2022


Christ is Born ! – Image Source: Holy Cross Monastery

Happy Nativity Christ was born 2022 years ago ! I wish a happy Nativity (Christmas).
ILet with the birth of Christ, his light and eternal dominion is born in us and lights us, as the star lighted the Magis who followed the Christmas star.

I wish my dear readers Peace, Love, Hope, Faith Good spiritual and bodily health and God's mercy by the prayers of the Holy Mother of God.

Saint Alexander Nevsky Largest Cathedral, Sofia Bulgaria. Tallest (53 m) and largest (by area and volume) cathedral in the Balkans and one of the 3 largest Eastern Orthodox Churches in Europe.

I wish you also a Happy New 2022 year ! Let the new year bring you new power to fight evil and do more good. Let the new year be peaceful, full of Grace and kindness to each of my dear readers ! Let the new year bring you more wisdom and understanding on everyone's life destination and bring you understanding on what is the proper things to do that would bring more joy and for our family, colleagues at work and people who surround is over the coming 12 months time.

Let each those who were sorrowful become joyful, those who hurted, get healed and those who worked hard find fruits out of their hard labor. Let those who hunger find food and those who are in pain find relief ! 
Use your obtained knowledge wisely and not only work on the mind  but work on the soul so they both become better !

Cheers and Happy New  Successful Year 2022 !!!

How to check Linux server power supply state is Okay / How to find out a Linux Power Supply is broken

Wednesday, January 6th, 2021


If you're a sysadmin and managing remotely Linux servers, every now and then if a machine is hanging without a reason it useful to check the server Power Supply state. I say that because often if the machine is mysteriously hanging and a standard Root Cause Analysis (RCA) on /var/log/messages /var/log/dmesg /var/log/boot etc. did not bring you to any different conclusion. The next step after you send a technician to reboot the machine is to check on Linux OS level whether Power Supply Unit (PSU) hardware on the machine does not have some issues.
As blogged earlier on how to use ipmitool to manage remote ILO remote boards etc. the ipmitool can also be used to check status of Server PSUs.

Below is example output of 2 PSU server whose Power Supplies are functioning normally.

[root@linux-server ~]# ipmitool sdr type "Power Supply"

PS Heavy Load    | 2Bh | ok  | 19.1 | State Deasserted
Power Supply 1   | 70h | ok  | 10.1 | Presence detected
Power Supply 2   | 71h | ok  | 10.2 | Presence detected
PS Configuration | 72h | ok  | 19.1 |
PS 1 Therm Fault | 75h | ok  | 10.1 | Transition to OK
PS 2 Therm Fault | 76h | ok  | 10.2 | Transition to OK
PS1 12V OV Fault | 77h | ok  | 10.1 | Transition to OK
PS2 12V OV Fault | 78h | ok  | 10.2 | Transition to OK
PS1 12V UV Fault | 79h | ok  | 10.1 | Transition to OK
PS2 12V UV Fault | 7Ah | ok  | 10.2 | Transition to OK
PS1 12V OC Fault | 7Bh | ok  | 10.1 | Transition to OK
PS2 12V OC Fault | 7Ch | ok  | 10.2 | Transition to OK
PS1 12Vaux Fault | 7Dh | ok  | 10.1 | Transition to OK
PS2 12Vaux Fault | 7Eh | ok  | 10.2 | Transition to OK
Power Unit       | 7Fh | ok  | 19.1 | Fully Redundant

Now if you have a server lets say on an old ProLiant DL360e Gen8 whose Power Supply is damaged, you will get an from ipmitool similar to:

[root@linux-server  systemd]# ipmitool sdr type "Power Supply"
Power Supply 1   | 30h | ok  | 10.1 | 100 Watts, Presence detected
Power Supply 2   | 31h | ok  | 10.2 | 0 Watts, Presence detected, Failure detected, Power Supply AC lost
Power Supplies   | 33h | ok  | 10.3 | Redundancy Lost

If you don't have ipmitool installed due to security or whatever but you have the hardware detection software dmidecode you can use it too to get the Power Supply state

[root@linux-server  systemd]# dmidecode -t chassis
# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 2.8 present.


Handle 0x0300, DMI type 3, 21 bytes
Chassis Information
        Manufacturer: HP
        Type: Rack Mount Chassis
        Lock: Not Present
        Version: Not Specified
        Serial Number: CZJ38201ZH
        Asset Tag:
        Boot-up State: Critical
        Power Supply State: Critical

        Thermal State: Safe
        Security Status: Unknown
        OEM Information: 0x00000000
        Height: 1 U
        Number Of Power Cords: 2
        Contained Elements: 0

To find only Power Supply info status on a server with dmideode.

# dmidecode –type 39


Plug between the power supply and the mainboard voltage / coms ATX specification

This can also be used on a normal Linux desktop PCs which usually have only 1U (one power supply) on many of Ubuntus and Linux desktops where lshw (list hardaware information) is installed to get the machine PSUs status with lshw 

 root@ubuntu:~# lshw -c power
       product: 45N1111
       vendor: SONY
       physical id: 1
       slot: Front
       capacity: 23200mWh
       configuration: voltage=11.1V
        Thermal State: Safe
        Security Status: Unknown
        OEM Information: 0x00000000
        Height: 1 U
        Number Of Power Cords: 2
        Contained Elements: 0

Finally to get an extensive information on the voltages of the Power Supply you can use the good old lm_sensors.

# apt-get install lm-sensors
# sensors-detect 
# service kmod start

# sensors
# watch sensors

As manually monitoring Power Supplies and other various data is dubious, finally you might want to use some centralized monitoring. For one example on that you might want to check my prior Zabbix to Monitor Hardware Hard Drive / Temperature and Disk with lm_sensors / smartd on Linux with Zabbix.

How to check if shared library is loaded in AIX OS – Fix missing

Thursday, February 20th, 2020


I've had to find out whether an externally Linux library is installed  on AIX system and whether something is not using it.
The returned errors was like so:


# gpg –export -a

Could not load program gpg:
Dependent module /opt/custom/lib/libreadline.a( could not be loaded.
Member is not found in archive

After a bit of investigation, I found that gpg was failing cause it linked to older version of, the workaround was to just substitute the newer version of over the original installed one.

Thus I had a plan to first find out whether this libreadline.a is loaded and recognized by AIX UNIX first and second find out whether some of the running processes is not using that library.
I've come across this interesting IBM official documenation that describes pretty good insights on how to determine whether a shared library  is currently loaded on the system. which mentions the genkld command that is doing
exactly what I needed.

In short:
genkld – creates a list that is printed to the console that shows all loaded shared libraries


Next I used lsof (list open files) command to check whether there is in real time opened libraries by any of the running programs on the system.

After not finding anything and was sure the library is neither loaded as a system library in AIX nor it is used by any of the currently running AIX processes, I was sure I could proceed to safely overwrite libreadline.a ( with libreadline.a with (

The result of that is again a normally running gpg as ldd command shows the binary is again normally linked to its dependend system libraries.

aix# ldd /usr/bin/gpg
/usr/bin/gpg needs:



# gpg –version
gpg (GnuPG) 1.4.22
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.


Home: ~/.gnupg
Supported algorithms:
Hash: MD5, SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
Compression: Uncompressed, ZIP, ZLIB, BZIP2



How to Set MySQL MariaDB server root user to be able to connect from any host on the Internet / Solution to ‘ ERROR 1045 (28000): Access denied for user ‘root’@’localhost’ (using password: YES) ‘

Tuesday, September 3rd, 2019


In this small article, I'll shortly explain on how I setup a Standard default package MariaDB Database server on Debian 10 Buster Linux and how I configured it to be accessible from any hostname on the Internet in order to make connection from remote Developer PC with MySQL GUI SQL administration tools such as MySQL WorkBench / HeidiSQL / Navicat / dbForge   as well as the few set-backs experienced in the process (e.g. what was the reason for ' ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) '  error and its solution.

Setting new or changing old MariaDB (MySQL) root server password


I've setup a brand new MariaDB database (The new free OpenSource software fork of MySQL) mariadb-server-10.3 on a Debian 10, right after the OS was installed with the usual apt command:

# apt install mariadb-server

Next tep was to change the root access password which was set to empty pass by default, e.g. connected with mysql CLI locally while logged via SSH on server and run:

MariaDB [(none)]> mysql -u root -p

use mysql;
update user set authentication_string=PASSWORD("MyChosenNewPassword") where User='root';

There was requirement by the customer, that MySQL server is not only accessed locally but be accessed from any IP address from anywhere on the Internet, so next step was to do so.

Allowing access to MySQL server from Anywhere

Allowing access from any host to MariaDB SQL server  is a bad security practice but as the customer is the King I've fulfilled this weird wish too, by changing the listener for MariaDB (MySQL) on Debian 10 codenamed Buster
changing the default listener
to be not the default (localhost) but any listener is done by modifying the bind-address directive in conf /etc/mysql/mariadb.conf.d/50-server.cnf:

root@linux:~# vim /etc/mysql/mariadb.conf.d/50-server.cnf

Then comment out

bind-address  =

and  add instead (any listener)


bind-address  =
root@linux:/etc/mysql/mariadb.conf.d# grep -i bind-address 50-server.cnf
##bind-address            =
bind-address    =

Then to make the new change effective restart MariaDB (luckily still using the old systemV init script even though systemd is working.

root@linux:~# /etc/init.d/mysql restart
[ ok ] Restarting mysql (via systemctl): mysql.service.

To make sure it is properly listening on MySQL defaults TCP port 3306, then as usual used netcat.

root@pritchi:~# netstat -etna |grep -i 3306
tcp        0      0  *               LISTEN      109        1479917  


By the way the exact mariadb.cnf used on this middle-sized front-backend server is here – the serveris planned to be a Apache Web server + Database host with MySQL DB of a middle range to be able to serve few thousand of simultaneous unique customers.

To make sure no firewall is preventing MariaDB to be accessed, I've checked for any reject rules iptables and ipset definitions, e.g.:

root@linux:~# iptables -L |gre -i rej

root@linux:~# ipset list


Then to double make sure the MySQL is allowed to access from anywhere, used simple telnet from my Desktop Laptop PC (that also runs Debian Linux) towards the server .

hipo@jeremiah:~$ telnet 3306
Connected to
Escape character is '^]'.
Connection closed by foreign host.


As telnet is not supporting the data encryption after TCP proto connect, in a few seconds time, remote server connection is terminated.


Setting MySQL user to be able to connect to local server MySQL from any remote hostname

I've connected locally to MariaDB server with mysql -u root -p and issued following set of SQL commands to make MySQL root user be able to connect from anywhere:


CREATE USER 'root'@'%' IDENTIFIED BY 'my-secret-pass';
GRANT ALL ON *.* TO 'root'@'localhost';
GRANT ALL ON *.* TO 'root'@'%';


Next step, I've took was to try logging in with root (admin) MariaDB superuser from MySQL CLI (Command Line Interface) on my desktop just to find out, I'm facing a nasty error.

hipo@jeremiah:~$ mysql -u root -H -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

My first guess was something is wrong with my root user created in MySQL's mysql.user table (In MySQL this is the privileges table that stores, how MySQL user credentials are handled by mysqld local OS running process.


Changing the MySQL root (admin) password no longer possible on Debian 10 Buster?


The standard way ot change the MySQL root password well known via a simple dpkg-reconfigure (provided by Debian's debconf is no longer working so below command produces empty output instead of triggering the good old Ncurses text based interface well-known over the years …


root@linux:~# /usr/sbin/dpkg-reconfigure mariadb-server-10.3



Viewing MariaDB (MySQL) username / password set-up from the CLI


To list how this set-privileges looked like I've used following command:


MariaDB [mysql]> select * from mysql.user where User = 'root';
| Host      | User | Password                                  | Select_priv | Insert_priv | Update_priv | Delete_priv | Create_priv | Drop_priv | Reload_priv | Shutdown_priv | Process_priv | File_priv | Grant_priv | References_priv | Index_priv | Alter_priv | Show_db_priv | Super_priv | Create_tmp_table_priv | Lock_tables_priv | Execute_priv | Repl_slave_priv | Repl_client_priv | Create_view_priv | Show_view_priv | Create_routine_priv | Alter_routine_priv | Create_user_priv | Event_priv | Trigger_priv | Create_tablespace_priv | Delete_history_priv | ssl_type | ssl_cipher | x509_issuer | x509_subject | max_questions | max_updates | max_connections | max_user_connections | plugin                | authentication_string | password_expired | is_role | default_role | max_statement_time |
| localhost | root | *E6D338325F50177F2F6A15EDZE932D68C88B8C4F | Y           | Y           | Y           | Y           | Y           | Y         | Y           | Y             | Y            | Y         | Y          | Y               | Y          | Y          | Y            | Y          | Y                     | Y                | Y            | Y               | Y                | Y                | Y              | Y                   | Y                  | Y                | Y          | Y            | Y                      | Y                   |          |            |             |              |             0 |           0 |               0 |                    0 | mysql_native_password |                       | N                | N       |              |           0.000000 |
| %         | root | *E6D338325F50177F2F6A15EDZE932D68C88B8C4F | Y           | Y           | Y           | Y           | Y           | Y         | Y           | Y             | Y            | Y         | N          | Y               | Y          | Y          | Y            | Y          | Y                     | Y                | Y            | Y               | Y                | Y                | Y              | Y                   | Y                  | Y                | Y          | Y            | Y                      | Y                   |          |            |             |              |             0 |           0 |               0 |                    0 |                       |                       | N                | N       |              |           0.000000 |


The hashed (encrypted) password string is being changed from the one on the server, so please don't try to hack me (decrypt it) 🙂
As it is visible from below output the Host field for root has the '%' string which means, any hostname is authorized to be able to connect and login to the MySQL server, so this was not the problem.

After quite some time on reading on what causes
' ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
I've spend some time reading various forum discussions online on the err such as the one on StackOverflow here's  how to fix access denied for user 'root'@'localhost' and one on's – ERROR 1045(28000) : Access denied for user 'root@localhost' (using password: no ) and after a while finally got it, thanks to a cool IRC.FREENODE.NET guy nicknamed, hedenface who pointed me I'm that, I'm trying to use the -H flag (Prodice HTML) instead of -h (host_name), it seems somehow I ended up with the wrong memory that the -H stands for hostname, by simply using -h I could again login Hooray!!!


root@linux:~$ mysql -u root -h -p
Enter password:
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 14
Server version: 10.3.15-MariaDB-1 Debian 10


Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

I've further asked the customer to confirm, he can connect also from his Microsoft Windows 10 PC situated on a different LAN network and got his confirmation. Few notes to make here is I've also installed phpmyadmin on the server using phpmyadmin php source code latest version, as in Debian 10 it seems the good old PHP is no longer available (as this crazy developers again made a mess and there is no phpmyadmin .deb package in Debian Buster – but that's a different story I'll perhaps try to document in some small article in future.

How to find out who sniffs out about your Android mobile smart phone

Thursday, November 16th, 2017


Maybe little know about this embedded Android mobile smart phone features but there is a few mobile code cheats that can help you find out a little bit about your phone security, that's pretty handy for anyone who really wants to know whether mobile phone is being sniffed / tapped on Android software level and can give you an idea on how much your smart phone data is protected or are you being a target of someone's secret surveillance, of course this info is just on Android firmware embedded features level and if your mobile is somehow hacked or trojanned the information that can show could be not adequate, but still it is a good info to know. I'm sure you'll be surprised how much embedded Android features are there for the controllers (Google staff) 🙂


1. Information about telephone, battery status and statistics about telephone use


To get information about battery, usage statistics and device.

2. Are Smart Phone Voice / SMS Transfers on?


This combination of numbers and symbols allows you to understand where your mobile is Transferring Calls, SMS-es or other messages. If you type this code and click call the phone screen should show any numbers to which any data is being transferred, if your phone is okay and not tapped you will get a message the phone call transfers and sms transfer is disabled. Always keep in mind that there is a danger for your info / data or even billings to be tapped already as Android is non-free software, so even if that code returns no transfers you're still insecure at the hands of Google's mercy.

3. Where are calls and SMS-es transffered in case if Voice / SMS Transfers are on?


This codes shows where are your input Calls and SMS-es are being transferred once someone is calling you and he is unable to reach you. At best case the inbound calls will be redirected as voice mail format to voice mail box of the number of your mobile operator.

4. Deactivate all kind of Phone Voice / SMS Transfers (Redirects) for security


By inputting above code you can deactivate all kind of redirects, which were prior configured at your mobile phone. The code is universal one and should work not only in Android but across all smart phones including IPhones. It is a recommended one especially if you're planning to travel in foreign country or region due to the roaming phone expenses.

5. Get IMEI (International Mobile Equipment Identifier) phone info


Above code provides information about the ID number of the mobile phone th so called IMEI (International Mobile Equipment Identifier). Using the email a mobile phone that has been recently stolen can be easily found, because the device is emitting its IMEI number to the mobile phone operator, nomatter what kind of SIM Card is inserted in the phone.


6. How to protect yourself from criminals and spies?

You can use alternative Messanger  Chat / Voice Clients such as: Telegram, Wickr, Signal or Alternatively run your own Jabber server and use it to securily communicate with your friends and relatives

Do not install an unknown source program to mobile phone, abstain from charging the phone on airports and suspicious free "charging" points, abtain from using any free wifi networks whose owner you don't know personally. Beware while browsing as there are websites that could infect you with javascript viruses and terrible phone malware stuff, to be safe make sure you have some kind of Antivirus software installed on the phone just in case.
Be vigilant!


7. Bigger list of Codes working across some of Android versions providing various phone stats and info (not working on all mobiles but might be working on yours)


Here is a list also with a useful codes for some of Android version releases (this will not work on IPhones)


*4636#*#*Information about statistics of phone, battery, usage

*#*#7780#*#*Nullify phone settings.. Delete only applications.

*2767*3855# – Nullify all settings, reinstall firmware.

*34971539#*#* – Full information about phone camera vendor etc.

*#*#273283*255*663282***Quickly archive media files

*#*#197328640#*#Test mobile service

232339#*#* / *#*#526#*#*Test Wireless (Wi-Fi) netework

*#*#232338#*#*Show Wi-Fi card physical MAC Address

*#*#1472365#*#*Quick GPS test

*#*#1575#*#* Various GPS Tests

*#*#0283#*#* Test mobile Loopback interface

*#*#0*#*#* – Test of liquid-crystals mobile display

*#*#0673#*#* / *#*#0289#*#*An Audio test

*#*#0842#*#* Test vibrations of the background phone lid (lightning)

*2663#*#* Get version of sensor screen

*2664#*#*Test of the sensor screen

* * * *0588#*#*Test distance sensor

* * *3264#*#*Get Installed RAM Version

*#*#232331#*#*Bluetooth Test

*#*#7262626#*#*Test GSM signal

*#*#232337#*#*Show bluetooth address

*#*#8255#*#* – Test Mobile Google Talk service

*#*#1234#*#*Information about firmware

*#*#1111#*#*Version of installed Open Trading software version


How to use find command to find files created on a specific date , Find files with specific size on GNU / Linux

Monday, October 16th, 2017

How to use find command to find files created on a specific date on GNU / Linux?


The easiest and most readable way but not most efficient ) especially for big hard disks with a lot of files not the best way) to do it is via:


find ./ -type f -ls |grep '12 Oct'


Example: To find all files modified on the 12th of October, 2017:

find . -type f -newermt 2017-10-12 ! -newermt 2017-10-13

To find all files accessed on the 29th of september, 2008:

$ find . -type f -newerat 2015-09-29 ! -newerat 2015-09-30

Or, files which had their permission changed on the same day:

$ find . -type f -newerct 2015-09-29 ! -newerct 2015-09-30

If you don't change permissions on the file, 'c' would normally correspond to the creation date, though.


Another more cryptic way but perhaps more efficient  to find any file modified on October 12th,2017,  would be with below command:


find . -type f -mtime $(( ( $(date +%s) – $(date -d '2017-10-12' +%s) ) / 60 / 60 / 24 – 1 ))




You could also look at files between certain dates by creating two files with touch

touch -t 0810010000 /tmp/f-example1
touch -t 0810011000 /tmp/f-example2

This will find all files between the two dates & times of the 2 files /tmp


find / -newer /tmp/f-example1 -and -not -newer /tmp/f-exampl2


How to Find Files with a certain size on GNU / Linux?


Lets say you got cracked and someone uploaded a shell php file of 50296 bytes a , that's a real scenario that just happened to me:

root@pcfreak:/var/www/blog/wp-admin/js# ls -b green.php 
root@pcfreak:/var/www/blog/wp-admin/js# ls -al green.php 
-rw-r–r– 1 www-data www-data 50296 окт 12 02:27 green.php

root@pcfreak:/home/hipo# find /var/www/ -type f -size 50296c -exec ls {} \;