Empty a file

2010-12-26 1 min read Learning Linux

This one is for those who know the “touch” command. Hope all of us do not follow a command just because it is on one of the popular site without trying to understand the command and the output.

Bash Script Beautifier

2010-12-23 1 min read Bash Learning Linux

Today I was working on a bash script written by someone else. And the script was maintained since long and had actually become quite big and there was no indentation followed. So, you can understand how difficult it was to understand the script. So, I set my foot forth to first find a beautifier for the bash script before I fixed it and my search ended here.

List all installed rpm packages and it’s size

2010-12-09 1 min read Fedora Linux

If you are looking for a command to see the disk usage by each of the rpm‘s then you can use this command:

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      &nbsp;rpm -q --queryformat "%10{SIZE}\t%{NAME}\n"
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  </td>
</tr>

And if you use this command very regularly then you can create an alias like

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    <div class="text codecolorer">
      &nbsp;alias rpm_size='rpm -q --queryformat "%10{SIZE}\t%{NAME}\n" '
    </div>
  </td>
</tr>

and use it like

New feature in Gnome/Nautilus

2010-12-05 1 min read Fedora GNOME

One of the things that I never realized that I am missing in Nautilus until they put the feature in was this. When a file is being copied and there is conflict, there should be option to rename the new file being copied. Also, if the file being copied is image then a small preview/thumbnail would be good.

Yesterday while copying some files, suddenly I noticed that this feature is there now. Pretty useful feature to have. Here’s the screen-shot.

Make any command read line enabled (on *nix)

2010-11-25 1 min read Bash Fedora Linux

Make any command read line enabled (on *nix)

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      rlwrap sqlite3 database.db
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  </td>
</tr>

Enable readline even if the command line application is not using it.

* View this command to comment, vote or add to favourites * View all commands by pykler

commandlinefu.com

by David Winterbottom (codeinthehole.com)

URL: http://feedproxy.google.com/~r/Command-line-fu/~3/mKEgYoyHCMA/make-any-command-read-line-enabled-on-nix

Use the last command’s output as input to a command without piping and bind to it to a key sequence in bash. (amit-agarwal.co.in)
DTerm: A command line anywhere and everywhere Oh, man. DTerm =… (kungfugrippe.com)
Python command line = Linux Bash command line (hackerz4u.com)
Data Hacks: Command Line ASCII Bar Charts (infosthetics.com)
Hack of the Day: commandlinefu – Linux Command Heaven (readwriteweb.com)

Screen enable/disable logging in all windows

2010-11-19 1 min read Bash Learning Linux

If you use screen command a lot then this is something that you will like 🙂

Screen enable/disable loggin in all windows

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      bindkey ^l at "#" log on<br /> <br /> bindkey ^o at "#" log off
    </div>
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</tr>

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The command when added in screenrc enables logging all open windows by using the C-l (control-l key combination) and disable by C-o . The lines need to be added in separate lines .

OpenLDAP and SSL – some links

2010-11-15 1 min read Learning Linux

Here are some of the links that may be of great help to you if you are having issues with setting up SSL and OpenLDAP. I was having some issues with this setup and these links helped me fix the same.

http://www.faqs.org/docs/Linux-HOWTO/SSL-RedHat-HOWTO.html

http://www.tc.umn.edu/~brams006/selfsign_redhat.html

http://docs.redhat.com/docs/en-US/Red_Hat_Directory_Server/8.1/html/Using_Red_Hat_Console/Starting_the_Server_with_SSL_Enabled-Enabling_SSL_in_the_DS_Admin_Server_and_Console.html

http://directory.fedoraproject.org/wiki/Howto:SSL http://www.linuxtopia.org/online_books//network_administration_guides/ldap_administration/appendix-common-errors_Common_causes_of_LDAP_errors.html