Bash Script Beautifier

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.

Take a screenshot of the window the user clicks on and name the file the same as the window title

Take a screenshot of the window the user clicks on and name the file the same as the window title

  <td>
    <div class="text codecolorer">
      &nbsp;sleep 4; xwd >foo.xwd; mv foo.xwd "$(dd skip=100 if=foo.xwd bs=1 count=256 2>/dev/null | egrep -ao '^[[:print:]]+' | tr / :).xwd"
    </div>
  </td>
</tr>

In general, this is actually not better than the “scrot -d4” command I’m listing it as an alternative to, so please don’t vote it down for that. I’m adding this command because xwd (X window dumper) comes with X11, so it is already installed on your machine, whereas scrot probably is not. I’ve found xwd handy on boxen that I don’t want to (or am not allowed to) install packages on.

Repeat a portrait eight times so it can be cut out from a 6″x4″ photo and used for visa or passport photos

Repeat a portrait eight times so it can be cut out from a 6″x4″ photo and used for visa or passport photos

  <td>
    <div class="text codecolorer">
      montage 2007-08-25-3685.jpg +clone -clone 0-1 -clone 0-3 -geometry 500 -frame 5 output.jpg
    </div>
  </td>
</tr>

Yes, You could do it in the GIMP or even use Inkscape to auto-align the clones, but the command line is so much easier.

Screen enable/disable logging in all windows

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

Screen enable/disable loggin in all windows

  <td>
    <div class="text codecolorer">
      bindkey ^l at "#" log on<br /> <br /> bindkey ^o at "#" log off
    </div>
  </td>
</tr>

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

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

Related articles

• Stephan Hermann: Ubuntu 10.04 LTS and OpenLDAP (shermann.name)
• Exploring LDAP SASL Authentication With Ruby (intridea.com)
• Stephan Hermann: [SOLVED] OpenLDAP, passwd and CRYPT passwords (shermann.name)
• Moodle – Slow LDAP Login (edugeek.net)

Firesheep addon allows the clueless to hack Facebook, Twitter over Wi-Fi

Firesheep addon allows the clueless to hack Facebook, Twitter over Wi-Fi If you thought hijacking a user’s social media session was only done by skilled hackers, now the Firesheep addon can allow even the truly clueless to become an Internet griefer.

URL: http://feeds.digg.com/~r/digg/topic/linux_unix/popular/~3/cb0qD08tfpU/firesheep_addon_allows_the_clueless_to_hack_facebook_twitter_over_wi_fi

Related articles

• Firesheep – a new tool for capturing data on unsecured WiFi (voipsa.org)
• Firesheep: Why You May Never Want to Use an Open Wi-Fi Network Again (blogs.forbes.com)
• Firesheep session hijacking tool makes public Wi-Fi useless (gizmag.com)
• Firefox Add-on Firesheep Brings Hacking to the Masses (pcworld.com)

Quick tip on zipping logs in real time.

Sometimes, some small things that we don’t actually think can be useful are such useful. I faced this couple of days back when I was working on something and the amount of logs getting generated and the files getting rotated was too fast. If I had to use this for sometime, I needed some script, application or something to make sure that the logs are zipped every few seconds. Finding an application for this would take time and what good is bash if we need to find applications for this. So, a simple bash command did the trick. Most of us would know this but applying it and using it at the right time, was what saved my life. Thanks to bash. Here is the command: