Bash script

A summary for some important Bash scripts

Command

Description

set

set [options] [arguments] sign (-) is used with the command’s option to enable that option and the plus sign (+) is used with the command’s option to disable that option -a It defines those variables or functions which are created or modified or exported. -b It informs the job termination. -B To do the task of the brace expansion. -C It disables the overwriting feature of the existing file. -e It exits for non-zero exit status value. -f It disables the filename generation task. -h It saves the location of the command where it has been used. -m It enables job control. -n It reads the commands. -t It exits from the command after executing a single command. -u It traces the unset variables. -v It prints the shell input lines. -x It displays the commands and their attributes sequentially. It is mainly used to debug the script.