nall – schedule your tasks like a pro

nall is a utility to run your scripts ( for whatever ) every defined period. Here is description:

Description : Nall is a small gtk+ application that discretely fits into your freedesktop

system tray (such as trayer).

Its purpose is to spawn periodically every kind of script and display a

one-line output in the tooltip window. The main usage of nall is monitoring or

just notifying of almost everything (it just depends upon your imagination and

ability to script).

For installation :

bash – refer the first parameter from last command quickly

To refer to first parameter from the last command quickly, you can use

!^

Note: This can also be referred as “!!:1“

bash refer parameters from the current command

In bash you can use

!#

to refer to any parameter from the current command, example:

mv ak amit.!#:1.txt
ls amit.ak.txt

Download Ticket Service – dl is now on fedora.

From : http://www.thregr.org/~wavexx/software/dl/

“dl” is a file exchange service that allows you to upload any file to a web server and generate a unique ticket for others to download. The ticket is automatically expired according to the specified rules, so that you don’t need to keep track or cleanup afterward. “dl” also allows you to grant an anonymous, one-time upload for others to send you a file, without the requirement of account management.

Continue reading

Debuggging bash cron scripts.

I have to several times debug scripts that I get complain about working when logging in normally but they do not work when run in cron mode. So, quite a lot of times, redirecting the stderr of the script is all that is required to see what is happening, but sometimes that just does not help if the script is calling another script which is mis-behaving and under lot of other conditions. So, how to at-least take a look at why these are failing, login with ssh.

ldap search function

First you will need the ldap search utility. The client for ldap search comes in openldap-clients, so you need to install that first:

sudo yum install openldap-clients

Now, that you have installed it, try to find something in some open ldap server, example:

ldapsearch -LLL -h  db.debian.org   -x  -b "dc=debian,dc=org" "cn=Joao*"

This should list couple of entries for you. Now, that you have ldapsearch working, lets define a function in .bashrc file:

Apache server-status – better looking

Apache provides a module to see the server-status. However the page is not too good looking. So, if you want to see a better looking information page, then you can download :

http://sourceforge.net/projects/pimpapachestat/

More details from the readme file of the project:

 

REQUIREMENTS

• On the system you want to install the pimped Apache status:
  – any webserver with php 5 (with curl; no database is needed)
• On all webservers you want to monitor:
  – apache 2.x
  – installed module mod_status and ExtendedStatus On
  – permission for the monitoring server to request the the
  alias /server-status (see below)

And tehn for installation: