$@ bash
file:test.sh
#! /bin/sh
echo '$#' $#
echo '$@' $@
echo '$?' $?
*If you run the above script as*
> ./test.sh 1 2 3
You get output:
$# 3
$@ 1 2 3
$? 0
*You passed 3 parameters to your script.*
$# = number of arguments. Answer is 3
$@ = what parameters were passed. Answer is 1 2 3
$? = was last command successful. Answer is 0 which means 'yes'Shell/BAsh
# GNU Bash or simply Bash is a Unix shell and command language written
# by Brian Fox for the GNU Project as a free software replacement for
# the Bourne shell.bash
echo # print something in the terminal
sudo # Run a command as an administator
set # Environment variables
export # Make an environment variable
login #login (arch linux)
rm # Remove a file
rmdir # Remove an empty directory
apt # apt package manager (Debian and Debian-based systems only)Bash
git commit && git push
git commit || echo "Commit failed"bash
grep " jane " ../data/list.txt | cut -d ' ' -f 1
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