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Ubuntu General Tips - 1


I have been using Ubuntu for almost two years and having faced few issues, I planned to write a series on the steps I followed to resolve it.
1. Append date into to log in Ubuntu:
When we use commands in log, we write the output to some file, that will make debugging easier. Say for instance, we run an ant script and want to write the log to a file. In normal case, we would give the following command,
ant command > filename
But in cases where we need to take periodic backup or log the output, its better to append date with the log. You can assign the date to the log dynamically using the date property  of Ubuntu. The Syntax for appending/setting date to a log dynamically is by using  `date +"%F"`
Eg., When you want to take backup of postgres database daily, you can use this command in the terminal.
[sourcecode]
pg_dump -U postgres databasename  > bkp-`date +"%F"`.out
[/sourcecode]
2. Command to Compress and Extract files in Ubuntu:
Compress and Decompress using command line is a great utility to be aware of, specially when dealing with remote machines. You can use any good tool like 7zipwinrar. But when you are using remote connectivity using ssh, or putty, its better suited you remain aware of your Ubuntu commands..:)
Command to compress a folder in Ubuntu:
[sourcecode]
tar -czvf filename.tar.gz folder (relative to current directory with no slash)
[/sourcecode]
Command to extract file in Ubuntu:
[sourcecode]
tar -C directory -zxvf filename
[/sourcecode]
3. To change System name:
When we access the localhost server, we often use the name 127.0.0.1 or localhost or the IP of your machine. Won't it be nice if we give http://shankar:8080 to access your localhost Tomcat? Won't it be great to set your own domain?
For this modify in /etc/hosts/, find the following line and modify it as provided below
127.0.0.1 localhost
add the desired name to it.
127.0.0.1 localhost desiredname
and then Restart the System
4. Compositing Problem in Docky/Cairo-Dock: 
When you use dockbars like DockyAvant Window ManagerCairoDock, more often than not, we find that the app crashes with a notification, that enable composition manager in unix which is required to Docky. To resolve this,
Alt+F2 and enter
Type, gconf-editor
Hit run.
check the key in /apps/metacity/general/compositing_manager
Check the check box.
Now your dock app will work perfectly.
For more such generic blogs, refer here.
Happy Working..:)

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கிறுக்கனின் கிறுக்கல்கள் - அழுகையின் சிறப்பு

அழுகை என்பதை வெறுத்தவன் நான்... என்னை ஒரு நாள் பிரிந்திருக்க முடியாமல் , கைப்பேசியில் நீ சிந்திய உன் கண்ணீர் ஓசை என் காதில் கேட்கும் வரை...

பின்குறிப்பு: கிறுக்கனின் கிறுக்கல்கள் எங்கிருந்தோ தழுவப்பட்டது போல் தோன்றினால் கிறுக்கன் ( நான் உண்மையை ஏற்றுக்கொள்பவன்..:) ) பொறுப்பல்ல. கிறுக்கனின் கிறுக்கல்களில் வரும் கிறுக்கல்கள் யாவும் என் சிறய மூளையில் உதித்ததே ஆகும்.  Inspirations could have been drawn from somewhere else, but its the execution that counts....Isn't it ?