bash

bash – expand shell variables ( bash bug resolved )

2015/08/17

As you would have noticed in the recent versions of bash, expansion does not work properly when expanding directory names. So, for something like this cd $varname if you press tab, then variable name …

ShellCheck – check basic POSIX shell script errors

2015/08/03

Here is description of the tool: […] To install dnf install ShellCheck And just run the tool on the script to get the common errors.

nice little bash function to search for running processes

2014/10/13

Here is a nice little handy function that I use very regurlarly. You can use this function with parameter to just grep for that or just type psa to see all the running processes. Just put this in your …

bash – refer the first parameter from last command quickly

2014/09/22

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

2014/09/15

In bash you can use !# to refer to any parameter from the current command, example:

Debuggging bash cron scripts.

2014/09/01

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 …

ldap search function

2014/08/25

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, …

get all the urls in html file (local or on server).

2014/02/17

To use this, you will need the lynx tool, so install that first. sudo yum install lynx Now, to get list of all the URLs in local html file or some URL, just execute this: lynx -dump -listonly Related …

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bash debug – log all executed commands

2014/02/03

Whenever I am writing a script in perl or bash, I always wish that there was some way to have all the commands logged or output to screen. I know there is “set -x” option to have debugging enabled, …

Apache server stats with small and useful bash script.

2013/11/29

Just copy this script to your web-server cgi-bin directory and enjoy. The script with show the common errors like 404 Error, Internal Server Error and others. It will show the User agent distribution …

bash – using the vi mode more effectively.

2013/11/22

You can first set the bash mode to vi. This will enable some vim like features to bash. So, add this to .bashrc : set -o vi Once, you have done that then its time to get more out of the vi mode. …

bashrc with lots of functions and useful alias

2013/10/30

Here is a link of a useful 10K lines bashrc http://pastebin.com/LEkXXuST You may not want to put the whole thing, but get an idea and use what you think can be helpful to you or at-least get an idea. …


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