The Linux Juggernaut

Q. I have a requirement to check whose accounts are expired in Linux machine and send a mail to root user about the accounts. How can i achieve this in Linux?

Ans : Here is the script to check the account expires of the users in Linux

#Created on:09-02-2010
#Last modified:02-05-2010
#Purpose:To check the user account status in Linux
#Author:Surendra Kumar Anne
#The below command will grep all the users in shadow file
#whose expiry … Continue Reading

Today we came across a requirement to check all the files in a directory for a specific entry. The situation is like this. We have two public DNS servers, we usually take backups of zone files when ever doing some changes to zone files. So all the backups are there in one folder. My duty is to check in which file we have did a particular change in our second DNS server. … Continue Reading

Some times you want to rename a group of files to lower case from upper case.  This renaming can be achieved by using a shell script and a tr command which will translate upper case to lower case

Here is my version of the script to do the activity.

#Created on:02-02-2011
#Last modified:02-02-2011
#Purpose:To Convert files/folders from upper case to lower case names
#Author:Surendra Kumar Anne
#The below for loop will take inputs from … Continue Reading

How to write bash shell to check the state of all services which are running/stopped in Linux?

Ans :

#Created on:02-02-2011


#Last modified:02-02-2011


#Purpose:To Check the status of services


#Author:Surendra Kumar Anne


#The below for loop will take inputs from chkconfig command to check the services which are running/stoped on the machine.
for i in `chkconfig --list | awk '{print $1}' | grep -v :`
do
/sbin/service $i status
done

This script will take services … Continue Reading