Archive for February, 2013

Clean disk space, fix broken shortcuts and delete old restore points on Windows 98,XP, 2000 with Free Spacer

Thursday, February 28th, 2013

 

freespacer perfect clean disk space on Windows 98 XP 2000 russian software

If you end up with a low disk space, or a lot of broken shorcuts without knowing how this exaclty happened  on  Windows XP and you need to free some disk space on OS without manually bothering to delete Windows Temporary files. Check out a tiny Russian Program called Free Spacer. The program is a good substitute for the inefficient windows default app Disk Cleaner. Free Spacer is FreeWare and it can be just used "as it is" but unfortunately access to source code is unavailable as well as use for commercial purposes is prohibited.

I've used Free Spacer multiple times on messed up PCs and always it does good, it is an excellent piece of software. Any Windows-Admin knows  Cleaning some disk space from unnecessary junk files, makes PC work faster. Free Spacer is very useful to run on Virus infested PCs, together with SpyBot , Malware Bytes and some AV soft like Avira.

As software is Russian, unfortunately menu buttons are in Russian too. Even non-russians can easily orientate as the most important buttons are first two from up to bottom and the last which is exit. The first button on from top onwards starts searching for garbage and obsolete and temporary files you can afterwards delete with the second button Удалить – meaning Delete in Russian). A note to make here is on newer Windows than XP Pro or XP Home FreeSpacer does not work well; even though it installs and runs on x86 Windows Vista and Win 7 it hangs up during scan.

For latest version of FreeSpacer check Free Spacer's Official version here, only available in Russian. As of time of writting this post FreeSpacer's latest version is 1.67, I've created mirror of FreeSpcer 1.67 here.

Here is description of what FreeSpacer "features" translated to English:

  • Powerful cleaner drive of unnecessary files.
  • Cleans efficient found "garbage." files
  • A large number of masks for the detection of unnecessary files / folders.
  • Cleanup folders with temporary files, not only Windows / Internet, but about 30 popular programs.
  • Search for invalid shortcuts.
  • Search system restore points.
  • Search for missing files and folders.
  • Support Exclude files and folders.
     

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Is it possible mail server to work on alternative port to 25?

Thursday, February 28th, 2013

If you're running a small home based Linux or BSD server with Qmail, Exim or Postfix and it happens your ISP has filtered incoming connections to TCP/IP port 25 and you wonder if it is possible to use other alternative port to 25 for example the (Secure SMTP) SMTPS 465 supported by all major SMTP servers, the answer unfortunately is it is not possible.

The only accepted and working mail transmission port works on TCP/IP Port 25, thus the only option to make the mail server working fine is contact your ISP and convince them to remove filtering for port 25 to your custom IP. Many ISPs set a Firewall filter for 25, because nowadays many Windows XP / Vista / 7 PCs get infected with Viruses and Trojans running a tiny SMTP server on the host and trying to send million of SPAM messages via the poor unknowing victim. This congests the network and often even creates ISP network overloads, thus ISPs prefer to filter Port 25 to get rid of such eventual problems.

Once again,  alternative port to 25 for Mail is impossible !

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How to change default port 25 to 995 or any other on Postfix mail server

Wednesday, February 27th, 2013

If you need to change default mail delivery port of Postfix mail server from 25 to any other port lets say to 995. Here is how:

Edit /etc/postfix/master.cf  – a small note to make here is master.cf is located on same location on mostly all Linux distributions as well as FreeBSD.

Find line with:

smtp      inet  n       –       n       –       –       smtpd

Change smtp – which is actually a reference for port 25 to whatever port you need – i.e. 995 After change line should look like:

995      inet  n       –       n       –       –       smtpd

Save config file and restart postfix to load new settings:

# /etc/rc.d/postfix restart
postfix/postfix-script: stopping the Postfix mail system
postfix/postfix-script: starting the Postfix mail system

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Improve your night sleep when using PC with Windows XP late at night with F.lux

Tuesday, February 26th, 2013

f.lux auto detect timezone geographic location after install screenshot microsoft windows XP

After testing F.lux on Mac OS X, I decided to install it and test it on a friend's Windows XP OS. Up is a screenshot from the program right after installed.

Just like on MAC OS X F.lux auto set the Geographic Location and started changing the Gamma of the screen to reddish at night. As you can see the change of Screen Color gamma can be set in various intervals with default of auto changing monitor backlid gamma every 20 secs.

On early day, when usually outside you see the day light because Sun Light shines on our planet, the color gamma is auto-configured to the normal light one.
I think in short future all computer vendors should think of embedding F.lux or some similar application to every Desktop PC, laptop, Phone and Tablet.

 

f.lux settings improve night sleep auto set monitor gamma ms windows xp

When F.lux is active a tiny icon with the F.Lux logo is visible on Taskbar like in below screenshot. From there you can view f.lux settings, see in what Color gamma mode the program works at present or to manually set custom color gamma. Enjoy

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The Piratebay Away from Keyboard – Documentary Movie about the rise and fall of Torrent Sharing

Tuesday, February 26th, 2013

The_Pirate_Bay_logo-documentary-movie-about-piratebay-creator-the-rise-and-fall-of-piratebay
A friend of mine mentioned about a documentary movie on intellectual freedoms of Sharing Copyrighted data on the Internet. Probably every young person or middle aged person in Europe have downloaded from scandalous torrent tracker ThePirateBay.com. As of time of writting most of European Union countries has prohibited the use of Piratebay.com, because the torrent tracker site "carelessly" helps people to share copyrighted data using notorious BitTorrent data sharing protocol. The topic of should or shouldn't there be a copyright laws to prohibit sharing of files between ordinary relatively poor internet users like me has been an issue of legislation for years now. From judicial point of view and from business perspective, the companies and individuals holding copyright are loosing money from free distribution of their copyrighted works. However from a point of view well being of European Union citizens it is insane and violation of basic European union legislation which is lobbying for free and equal access to education of EU citizens. There has been numerous scandals, because The Piratebay is being convinced to be just a money laundry machine under the coverage of helping people educated itself, as i saw some investigation on thepiratebay, claiming most of its finances passes through a numerous offshore accounts which makes it impossible to track and money TPB generates from the website advertisements end up in someone's pocket who did not pay EU taxations. Even if this is true, I think the immaterial side of helping people to educate themselves by sharing the world's most important Movies, Music, Software etc. makes TPB more in service than harm to society.


 

The PirateBay – Away from Keyboard (Piratebay AFK Documentary on Torrent Sharing

Enjoy

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Improve night sleep with F.lex on Mac OS X, iPhone and iPad

Monday, February 25th, 2013

f.lux application change screen color gamma to sleep better when using computer late at night macOSX and iphone
Recently I blogged about how to reduce night sleep problems and diminish insomnia on Linux with little command line tool – redshift. Now I'm in a friend who is a Mac user and since he had lately problems with sleeping. I remembered about redshift and one other tool which I read about called F.lex. We give it a try and installed it on his Mac OS X Lion – ver (10.7.5). Installation is like other standard Mac OS X applications, download f.lux version for Mac OS then click  .DMG binary and you're asked if you want to install the program in Mac active Applications. That's all the program is installed and you don't even need to configure it as the program automatically determines Time Zone / Geographic Location  configured for OS X. Once installed you will notice the F.lux switching screen gamma icon on left of Mac panel:

sleep better when using Mac laptop at night with F.lux

In F.lux configuration, by using Search button the program can automatically determine Geographic Location, however if you it fails to determine proper location and improperly sets the screen color gamma, you can manually set location coordinates. F.lux tunes screen color gamma accordingly to day or night and time in day. If it is night it makes the screen reddish, so eyes our eyes relax strain (stress) and our organism prepares to get to bed so once you're in bed it is easier for your brain to get asleep.

F.lux screenshot on Mac OS X Lion improve night sleep insomnia

Now here it is 23:37 at Night and F.lux smartly changed the color gamma accordingly to night mode (reddish) gamma. I've noticed on F.lux's website there is version for iPhone and iPad

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Secure delete files irreverseble on Debian and Fedora GNU / Linux

Thursday, February 21st, 2013

I just read an article in Linux-Magazine on Advanced File Management named – "Beyond the Basics". Most of what the article says is pretty trivial and known by any Linux enthusiast average user and administrator. There was one command mentioned shred which is probably not so well known among Free Software users shred allows the user to "secure delete files" / from the hard disk irreversible.

The tool is part of coreutils package and available across mostly all Linux distributions including Debian / Ubuntu debian derivatives and the RedHat based distros CentOS, Fedora, RHEL etc.

Just for info for those who don't know how to check, to which package a command belongs with rpm and dpkg, here is how;

[hipo@centos ~]$ rpm -qf /usr/bin/shred
coreutils-5.97-23.el5_4.2

hipo@debian:~$ dpkg -S /usr/bin/shred
coreutils: /usr/bin/shred

Here is how to delete a sample file ovewritting 3 times (-n2 – means 3 because in comuters we know we countr from 0 – 0 1 2 3), the z option fills up with zeros after overwritting the file ( just like seen on paste), -v option shows verbose what shred is doing and -u option truncates removes file after overwritting

noah:/var/tmp# shred -n2 -zvu crash20121113021508.txt
shred: crash20121113021508.txt: pass 1/3 (random)…
shred: crash20121113021508.txt: pass 2/3 (random)…
shred: crash20121113021508.txt: pass 3/3 (000000)…
shred: crash20121113021508.txt: removing
shred: crash20121113021508.txt: renamed to 00000000000000000000000
shred: 00000000000000000000000: renamed to 0000000000000000000000
shred: 0000000000000000000000: renamed to 000000000000000000000
shred: 000000000000000000000: renamed to 00000000000000000000
shred: 00000000000000000000: renamed to 0000000000000000000
shred: 0000000000000000000: renamed to 000000000000000000
shred: 000000000000000000: renamed to 00000000000000000
shred: 00000000000000000: renamed to 0000000000000000
shred: 0000000000000000: renamed to 000000000000000
shred: 000000000000000: renamed to 00000000000000
shred: 00000000000000: renamed to 0000000000000
shred: 0000000000000: renamed to 000000000000
shred: 000000000000: renamed to 00000000000
shred: 00000000000: renamed to 0000000000
shred: 0000000000: renamed to 000000000
shred: 000000000: renamed to 00000000
shred: 00000000: renamed to 0000000
shred: 0000000: renamed to 000000
shred: 000000: renamed to 00000
shred: 00000: renamed to 0000
shred: 0000: renamed to 000
shred: 000: renamed to 00
shred: 00: renamed to 0
shred: crash20121113021508.txt: removed
 

One common use of shred is by sysadmins who has to prepare old server containing lets say client data (SQL) – mail boxes or just file data and then sell it to third parties making sure data will be un-restorable for the new owner. Also shred is used a lot by crackers who set up "time bombs" activated on user activity or inactivity to destroy evidences in case of crackers PC is being captured by police. Though shred cannot guarantee 100% that deleted data can't be recoved within a special data recovery lab in most of cases it is enough to assure data with it will be almost impossible to recover.

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Bulgaria must be out of the European Union!

Wednesday, February 20th, 2013

Bulgaria to be out of European Union immediately. The only hope for restoration of Bulgarian Economy

Bulgaria is European Union state member since January 1 2007. I write this words with deep regret. We Bulgarians have already a bitter experience for being in hard conditions, practically the situation in Bulgaria is like this since the complete fall of Communism in 1991. We've been lied to hav better future in the European Union over the last years. 6 Years passed since our acceptance in EU and for this years I can say nothing changed for good in our country. We've seen "how good and bright" future awaits in the European Union over the last years. It is all lies, nothing changed for good for us Bulgarians, not that the communism was different but at least in Communism we had some working economy, now with this EU and all the restrictions (quotas for production), conditions to meet factories to close and reduction of our Atomic energy blocks, we've been totally wasted. If you walk the street you see the desperation and the absurdity of everything in my homeland. It is more than clear, that we need change and the only change can happen if we get out of the European Union. Our politicians made a huge mistake, for lobbying to join the EU. We become another waste country for Western second hand cars – a car graveyard. The old and hard to recycle cars has been pushed to my country. Old computers, low quality food from West, idiotic change of already working systems in the government with dis-functional Computerized ones. This is a very small list of all the shit we got from the EU. Big food store chains expanded there market, we are used for cheap labor and a hot-point for call-centers. We Bulgarians are literally used and abused by Western Civilization. We were bought as white slaves for "candies" and empty promises. If our politicians don't wake up and see Bulgaria is impossible to survive within the abnormal European Union our country is doomed. anyways we should not desparate, there is hope for us. God will help us for we've been tortured for 5 centuries by Turkish, we stopped invasion of Turks to Western Europe historically, we saved the Jews from extermination during Second World War. Bulgarians have always been a honest and good minded people. Now with this technological insanity adopted from the west and all the "going nowhere" of European union we're a miserable victim. Wake up dear Bulgarians, we have nothing in common with the European Union, neither writing, nor language nor our 15 century culture merges with most of EU countries. Even in religious aspect we're different. AThe only way with future for Bulgaria is out of the European Union and join forces with our Russian, Belarusian and other Slavonic brother nations. Rise brothers and sisters and lobby for Bulgaria being out of the European Union!!!!

SAY NO TO EUROPEAN UNION – SAY ES TO BULGARIAN FUTURE !!!!

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Improve your night sleep (Insomnia) on Linux with redshift

Friday, February 15th, 2013

sleep better at night while using Linux with redshift command line and gui applet / improve your insomnia while being a linux user
For a while I've been experiencing troubles with getting asleep. As I work in the field of IT already for 10 years and with time it seems the problem is accelerating. I've read on the internet a lot on the topic of getting asleep and how this relates to computers and computer equipment use and came to the conclusion one of the main reasons I have troubles getting asleep is I use computer late at night usually I use PC until 2, 3 o'clock. Then when I go to bed, I cannot fall asleep until its early in the morning usually 6, 7 in the morning. My main operating system on notebook is Linux so almost all of the time I use Linux. I've noticed when I occasionally use Windows, my eyes tend to be less strained afterwards and I sleep better. Thus I suspected there should be some kind of tool in Linux which changes how PC screen displays to make eyes more relaxed. I didn't have the time to research seriously and before some time the little research I've done on this led me to nothing. Just a week ago, I've read one of the articles in Linux Magazine (December) issue, there is a very thorough article in it on how to avoid headaches and eye strain using a tiny tool which changes monitor screen gamma called redshift. In this article will explain in short how to install and use redshift to make your PC work less stressful and improve your sleeping at night. I'm using Debian as a basis Linux distro and thre redshift is available via package, other deb derivatives Ubuntu, Xubuntu etc. aslo have it. For Fedora and most of other Linux distributions redshift is also available from default repositories. For those who use Slackware or some older Linux distributions, redshift has to be installed manually from source but this should be trivial.

1. Install Redshift and Redshift-gtk packages

To install on Debian and Ubuntu:

# apt-get –yes install redshift redshift-gtk

On Fedora install with yum:

# yum -y install redshift

After installed you will have two programs to tune the screen color temperature, one is console based ( redshift ) and the other one is GUI based ( gtk-redshift ).

redshift-gtk is a GUI frontend

Here is a list of redshift tool options:

2. Changing color gamma with redshift

hipo@noah:~$ redshift -h
Usage: redshift -l LAT:LON -t DAY:NIGHT [OPTIONS...]

Set color temperature of display according to time of day.

  -h        Display this help message
  -v        Verbose output

  -g R:G:B    Additional gamma correction to apply
  -l LAT:LON    Your current location
  -m METHOD    Method to use to set color temperature (randr or vidmode)
  -o        One shot mode (do not continously adjust color temperature)
  -r        Disable initial temperature transition
  -s SCREEN    X screen to apply adjustments to
  -t DAY:NIGHT    Color temperature to set at daytime/night

Please report bugs to <https://bugs.launchpad.net/redshift>

To set your screen to Reddish mode which will relax your eye strain and therefore – when you go to sleep you have a better sleep, type:

 hipo@noah:~$ redshift -l -35:-56 -t 5000:3300

Other monitor red-color afternoon or night time gamma to relax your eyes is;

hipo@noah:~$ redshift -l 52.5:13.4

3. Setting redshift to auto change screen gamma via cronjob

If you prefer automatically changing color gamma to reddish at night – will make your eyes (and hence organism) less alert set as a cronjob in lets say 22:00 o'clock at night;

 hipo@noah:~$ crontab -u root -e

00 22 * * * redshift -l -35:-56 -t 5000:3300 2>&1 >/dev/null

4. Controlling manually between standard and reddish color gamma through gtk-redshift

For people who like to control and switch between color gamma using GNOME Applet run gtk-redshift like so:

hipo@noah:~$ gtk-redshift  -l 52.5:13.4

gtk redshift gnome applet screenshot Debian Linux

Clicking on the icon of redshift the color gamma gets changed to red, another toggle reverses back to normal.

There is another tool called F.lux which does the same as redshift. F.lux precedes redshift, actually redshift author write it as attempt to create superior F.lux. Flux works on Windows and Mac OS X – so users who work at night on this platforms might want ot check it. I tried installing f.lux on my Debian Squeeze Linux but had troubles because of requirement for newer python-appindicator :

noah:/home/hipo# apt-get install fluxgui
Reading package lists... Done
Building dependency tree      
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 fluxgui : Depends: python-appindicator (>= 0.0.19) but it is not installable
E: Broken packages

 

Probably with some tampering I can make f.lux work but I was lazy and since I already had redshift, I decided to quit and just be a happy redshift user.

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Disable bluetooth on Linux IBM / Lenovo Thinkpad laptops

Thursday, February 14th, 2013

bluetooth gnu linux disable bluetooth linux how to tux logo bluetooth thinkpad

I have a Debian GNU / Linux squeeze with bluetooth and bluetooth is started automatically on system boot. This is pretty annoying, cause I use bluetooth quite rarely.
 disable / enable bluetooth via terminal is controlled via Linux sysfs virtual filesystem. The command to disable bluetooth one time is:

debian:~# echo 0 > /sys/devices/platform/thinkpad_acpi/bluetooth_enable

It is efficient in terms of energy saving especially if you use often your notebook on battery to turn off bluetooth permanently and only enable it when needed with:

debian:~# echo 1 > /sys/devices/platform/thinkpad_acpi/bluetooth_enable

To permanently disable bluetooth on Linux boot use:

# service bluetooth stop

In /etc/rc.local before exit 0 line place:

echo 0 > /sys/devices/platform/thinkpad_acpi/bluetooth_enable

An alternative method to permanently disable bluetooth (on other non-Thinkpad – any brand laptops) is via rfkill (bluetooth device control interface), on Ubuntu rfkill is installed by default but Debian users has to explicitly install it via apt:

debian:~# apt-get install –yes rfkill

Once rfkill is installed on host put a line before exit 0 in /etc/local:

rfkill block bluetooth
 

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