Posts Tagged ‘hack’

Disable annoying ads on Youtube in Firefox and Google Chrome – Adblock Plus

Monday, November 17th, 2014


adblock-plus-great-way-to-stop-annoying-website-advertisements
I'm not an Youtube addict but every now and then to kill some time I watch videos there usually this is 10 to 20 videos a day. Over the last few months, I've noticed Youtube video Adsense ads has increased dramatically and this is seriously breaking the overall user-experience one gets when watching videos.

Thus finally I decided to get rid of the ads and to prevent the annoyance, i've seen a hack on LifeHacker claiming to disable Youtube Ads with Javascript setting, I've tested this one but probably since 2013 when the hack was working Youtube updated, there player Ads inclusion algorithm and this Adus removal tip no longer works.

Adblock-Plus-remove-google-youtube-facebook-advertisements-and-browser-ads-firefox-chrome-plugin

Thanksfully there is an easy way to achieve that with no need for crytic commands in through developers by using the good old Adblock Plus Browser extension which besides of capable of removing standard Adsense Advertisements (showing up on almost every webpage on the internet) also removes Adsense Advertisements "embedded" into Youtube Videos is a generally one of the few recommended plugins to increase your browser security.

Installation of Adblockplus 2 is done directly from plugin website for both Firefox and Google Chrome, just click on Install button and you're done.
You don't need to do any post-configuration of Adblockplus even though for those who like to finely tune on any custom website White / Blacklisting.

Resolving messed up console / terminal on GNU Linux / A tiny old school hack ;)

Thursday, September 26th, 2013

Resolve fix messed up unreadable gnu linux console terminal screenshot

Its probably not so common problem among new-comer Linux users / admins but sooner or later even those who haven't will cat by mistake (or on purpose) some binary file end result will be physical console / terminal / SSH Client (lets say PuTTY) will display some non-sense characters and whether typing you will type in some "alien language" characters this continues until you close up console and re-login. Of course its not such a big problem to re-login or (kill active SSH session).

fix terminal after showing displaying binary file by mistake catting wrong file incident

But there is no sense to do that and loose time and most importantly loose your logged in session (especially if you have hopped to 4 ssh sessions and you forgot to run GNU / screen). Thus its handy to know about
 

# reset

command. Once issued in most cases TTY messed up characters gets fixed up. However if even reset doesn't fix it, there is another "hack" to resolve it with no need for relogin. This is an old hack from my old Linux days and not so popular among admins, here is how:

Type

cat

press Enter

and then press

Ctrl + O (Ctrl ^ O)

 

then press Enter

and then again press

Ctrl + D (Ctrl ^ D)

Nice hack isn't it ? 🙂

Tracking multiple log files in real time in Linux console / terminal (MultiTail)

Monday, July 29th, 2013

Multitail multiple tail Debian GNU Linux viewing Apache access and error log in shared screen
Whether you have to administer Apache, Nginx or Lighttpd, or whatever other kind of daemon which interactively logs user requests or errors you probably already know well of tail command (tail -f /var/log/apache2/access.log) is something Webserver Linux admin can't live without. Sometimes however you have number of Virtualhost (domains) each configured to log site activity in separate log file. One solution to the problem is to use GNU Screen (screen – terminal emulator) to launch multiple screen session and launch separate tail -f /var/log/apache2/domain1/access.log , tail -f /var/log/apache2/domain2/access.log etc. This however is a bit of hack and except configuring screen to show multiple windows on one Virtual Terminal (tty or vty in gnome), you can't really see output simultaneously in one separated window.

Here is where multitail comes handy. MultiTail is tool to visualize in real time log records output of multiple logs (tails) in one shared terminal Window. MultiTail is written to use ncurses library used by a bunch of other useful tools like Midnight Command so output is colorful and very nice looking.

Here is MultiTail package description on Debian Linux:

linux:~# apt-cache show multitail|grep -i description -A 1
Description-en: view multiple logfiles windowed on console
 multitail lets you view one or multiple files like the original tail

Description-md5: 5e2f688efb214b063bdc418a705860a1
Tag: interface::text-mode, role::program, scope::utility, uitoolkit::ncurses,
root@noah:/home/hipo# apt-cache show multitail|grep -i description -A 1
Description-en: view multiple logfiles windowed on console
 multitail lets you view one or multiple files like the original tail

Description-md5: 5e2f688efb214b063bdc418a705860a1
Tag: interface::text-mode, role::program, scope::utility, uitoolkit::ncurses,
 

Multiple Tail is available across most Linux distributions to install on Debian / Ubuntu / Mint etc. Linux:

debian:~# apt-get install --yes multitail
...

On recent Fedora / RHEL / CentOS etc. RPM based Linuces to install:

[root@centos ~]# yum -y install multitail
...

On FreeBSD multitail is available to install from ports:

freebsd# cd /usr/ports/sysutils/multitail
freebsd# make install clean
...

Once installed to display records in multiple files lets say Apache domain name access.log and error.log

debian:~# multitail -f /var/log/apache2/access.log /var/log/apache2/error.log

It has very extensive help invoked by simply pressing h while running

multtail-viewing-in-gnome-shared-screen-debian-2-log-files-screenshot

Even better multitail is written to already have integrated color schemes for most popular Linux services log files

multitail multiple tail debian gnu linux logformat different color schemes screenshot
List of supported MulLog Color schemes as of time of writting article is:

acctail, acpitail, apache, apache_error, argus, asterisk, audit, bind, boinc, boinctail ,checkpoint, clamav, cscriptexample, dhcpd, errrpt, exim, httping, ii, inn, kerberos, lambamoo, liniptfw, log4j, mailscanner, motion, mpstat, mysql, nagtail, netscapeldap, netstat, nttpcache, ntpd, oracle, p0f, portsentry, postfix, pptpd, procmail, qmt-clamd, qmt-send, qmt-smtpd, qmt-sophie, qmt-spamassassin, rsstail, samba, sendmail, smartd, snort spamassassin, squid, ssh, strace, syslog, tcpdump, vmstat, vnetbr, websphere, wtmptail

To tell it what kind of log Color scheme to use from cmd line use:

debian:~# multitail -Csapache /var/log/apache2/access.log /var/log/apache2/error.log

multiple tail with Apache highlight on Debian Linux screenshot

Useful feature is to run command display in separate Windows while still following log output, i.e.:

[root@centos:~]# multitail /var/log/httpd.log -l "netstat -nat"
...

Multitail can also merge output from files in one Window, while in second window some other log or command output is displayed. To merge output from Apache access.log and error.log:

debian:~# multitail /var/log/apache2/access.log -I /var/log/apache2/error.log

When merging two log files output to show in one Window it is useful to display each file output in different color for the sake of readability

For example:
 

debian:~# multitail -ci green /var/log/apache/access.log -ci red -I /var/log/apache/error.log

multitail merged Apache access and error log on Debian Linux

To display output from 3 log files in 3 separate shared Windows in console use:

linux:~# multitail -s 2 /var/log/syslog /var/log/apache2/access.log /var/log/apache2/error.log

For some more useful examples, check out MultiTail's official page examples
There is plenty of other useful things to do with multitail, for more RTFM 🙂

How ot fix Widgets drag and drop not working on WordPress

Thursday, July 14th, 2011

how to fix WordPress widgets missing drag and drop bug

My WordPress blog had an odd problem, all on the blog, worked just fine except the Widgets add new widget drag and drop functionality.
As there was new version of wordpress available I tried updating but this fixed the missing drag and drop widget functionality neither, so finally after a bit of googling and experimentation to follow suggested fixes like using the enable Accessiblity Mode button on top Widgets.Thus the common suggested fix that worked for most of the people who stumbled upon this annoying wordpress bug was to simply nagivate to:

Appearance -> Widgets -> Screen Options -> Enable Accessibility Mode As for me pressing over the Screen Options was impossible (nothing happened when I pressed over it), finally I’ve found a hack 😉

The hack is quite simple, all I had to do is just pass a variable ?widgets-access=on to the widget.php php script
Therefore the fix to the problem was as follows http://blog.mysite.com/wp-admin/widgets.php?widgets-access=on

And done, FIXED! 😉

Create Routine mirror copy of milw0rm & packetstorm exploits database

Wednesday, January 13th, 2010

Few weeks ago, I’ve built a small script and put it to
execute in cron in order to have an up2date local copy of
milw0rm. Ofcourse that’s pretty handy for several reasons.
For example milw0rm may go down and the exploit database tobe lost forever. This once happened with hack.co.za which ceasedto exist several years ago, even though it has one of thegreatest exploits database for it’s time.
Luckily I did a copy of hack.co.za, knowing that it’s gone
day might come here is the mirror archive of hack.co.za database
Anyways back to the main topic which was creating routine mirror
copy of milw0rm exploits database.
Here is the small script that needs to be setup on cron in order tohave periodic copy of milw0rm exploits database.
#!/usr/local/bin/bash# Download milw0rm exploitsdownload_to='/home/hipo/exploits';milw0rm_archive_url='http://milw0rm.com/sploits/milw0rm.tar.bz2';milw0rm_archive_name='milw0rm.tar.bz2';if [ ! -d '/home/hipo/exploits' ]; thenmkdir -p $download_to;ficd $download_to;wget -q $milw0rm_archive_url;tar -jxvvf $milw0rm_archive_name;rm -f $milw0rm_archive_name;exit 0The script is available as wellfor download via milw0rm_exploits_download.sh
To make the script operational I’ve set it up to execute via cron with
the following cron record:
00 1 * * * /path_to_script/milw0rm_exploits_download.sh >/dev/null 2>&1Here is another shell code I used to download all packetstormsecurity exploits frompacketstormsecurity’s website:
#!/usr/local/bin/bash# Download packetstormsecurity exploits# uses jot in order to run in freebsdpacketstorm_download_dir='/home/hipo/exploits';if [ ! -d "$packetstorm_download" ]; thenmkdir -p "$packetstorm_download";for i in $(jot 12); do wget http://www.packetstormsecurity.org/0"$i"11-exploits/0"$i"11-exploits.tgz; done
The script can be obtained also via following link (packetstormsecurity_expl_db_download.sh)

Another interesting tutorial that relates to the topic of building local
mirrors (local exploit database) is an article I found on darkc0de.com’s
website calledHow to build a local exploit database
The article explains thoroughly
howto prepare packetstormsecurity exploits database mirrorand
how to mirror milw0rm through python scripts.
Herein I include links to the 2 mirror scripts:
PacketStorm Security Mirror Script
milw0rm archive mirror script
Basicly the milw0rm archive script is identical to the small shellscript
I’ve written and posted above in the article. However I believe there is
one advantage of the shellscript it doesn’t require you
to have python installed 🙂

The day, Today

Tuesday, May 20th, 2008

The day started a bit normal. I did my morning excercise, then I prayed. I spoke with Dzemil (A macedonian colleague of mine) and we set up a meeting for 12:30, I ate. I received few calls from the office with requests to do few little things. At 12:30 I met Dzemil at the College restaurant. We spend some time talking with him and another turkish colleague. Then we went to speak with Bozhidar Bozhkov about the applications for Holland, what is the procedure of transfering from the college here to Arnhem Business School etc. Laters I went home and did some work on the servers and red and did my fourth cisco test. I went to my cousin and after that went to Javor, we went out with Ina and Javor for a coffee to Kukla. Afterwards I went home and played with Dynamips. For all that wonder what the hack Dynamips is. Well Dynamics is a Cisco emulator just like VMWare is an OS emulator with the exception that Dynamics is builded to run only Cisco’s IOS. I found that nice Video tutorial Cisco Router Emulation Software Dynamips Video Tutorial, check it out here Here . Since I needed a Cisco IOS image and I’m not a Cisco customer I used torrents to download a collection of Cisco ISO’s and used one of the isos to make it work on my Windows Vista. I have problems running it because of lack of permissions, caused by the famous UAC ( User Access Control ). The solution for me was to use a privileged command prompt and start, both the Dynamips sever and my custom configured simple1.net which connected to the server and loaded the cisco image. There is also a very nice and extended tutorial on the topic of Dynamips it’s located Here . Alto today tested the previously installed Wireshark. Wireshark is a very nice substitute for iptraf for windows it has a nice and easy to use graphical interface, supports capturing and has lot of traffic analysis possibilities I strongly recommend it to anyone coming from a Linux/BSD background like me and searching for a nice Windows substitute for iptraf. Check out wireshark on the following URL . Now I’m going to change the topic and say a few words for my spiritual state. Today it was a hard day. I was tempted by the devil to think bad thoughts and did sinned for which I search forgiveness. Life it so hard I realize it more and more day by day. Very often old spirits which tormented me for a long time are trying to come back. I haven’t smoked today also and again thanks for that should fly to God who delived me from this terrible vice. As a conclusion I should say that for everything I should thanks to God and pray for him to forgive my unfaithfulness. END—–