How to extract a substring matching a pattern from a Unix shell variable

How to extract a substring matching a pattern from a Unix shell variable

regex unix shell sed grep

shell

Unix shell script - printing all the variables available in the scope

unix shell

shell

In python 2.4, how can I execute external commands with csh instead of bash?

python shell csh tcsh

shell

Using make to execute independent tasks in parallel

unix shell makefile buildfarm

shell

Integer comparison in bash

bash shell unix

shell

how to sort alphanumerically in Unix with sort? More complex than seems

python bash shell unix sorting

shell

KornShell Boolean Conditional Logic

shell unix scripting ksh

shell

try except IndentationError

python shell exception

shell

Incremental number in shell script on each loop

bash shell

shell

What is the fastest way to autobreak a line of gigabytes separated by keywords using bash shell?

perl bash shell sed awk

shell