How to insert the content of a file into another file (if regexp) in perl/shell

How to insert the content of a file into another file (if regexp) in perl/shell

regex perl shell insert paste

shell

How do I make sense of a batch file?

shell batch-file

shell

In Linux shell bash script, how to print to a file at the same line?

linux bash shell

shell

Bash: How to retrieve a variable value inside a background while loop

linux bash shell unix scripting

shell

making each line double vim

shell vim vi

shell

Sort Date/Time in Unix

perl bash shell sed awk

shell

How to evaluate a shell variable each time it's used

shell interpolation zsh

shell

call a shell script from another shell script via sudo - environment variables?

bash shell environment-variables sudo

shell

Combine multiple cut commands into variable assignations into one cut command

bash shell

shell

Is there anything special about command line arguments prefixed with dashes?

c linux bash shell unix

shell