/Shell/Bash/What does the dollar sign mean in bash

What does the dollar sign mean in bash

$1, $2, $3, ... are the positional parameters.
"$@"  is an array-like construct of all positional parameters, {$1, $2, $3 ...}.
"$*"  is the IFS expansion of all positional parameters, $1 $2 $3 ....
$#    is the number of positional parameters.
$-    current options set for the shell.
$$    pid of the current shell (not subshell).
$_    most recent parameter (or the abs path of the command to start the current shell immediately after startup).
$IFS  is the (input) field separator.
$?    is the most recent foreground pipeline exit status.
$!    is the PID of the most recent background command.
$0    is the name of the shell or shell script.

Source: stackoverflow.com

Similar codes

0 vote190 views1 answer
Vlc doesnt open after install ubuntu
Shell/Bash
1 vote191 views1 answer
How to install rasa in pip
Shell/Bash
0 vote200 views1 answer
How to update all repositories in manjaro using terminal
Shell/Bash
0 vote195 views1 answer
Reset to factory settings fortigate
Shell/Bash
1 vote194 views1 answer
Batch remove file
Shell/Bash
0 vote181 views1 answer
Expo font install
Shell/Bash
0 vote194 views1 answer
How to install neofetch
Shell/Bash
3 votes208 views1 answer
Git checkout as different name
Shell/Bash
0 vote180 views1 answer
Powershell get all computers in ou
Shell/Bash
0 vote191 views1 answer
Composer install require ext-dom * -> it is missing from your system
Shell/Bash