Special bash variables

here are a few other variables that the system sets for you to use as well.

$0 - The name of the Bash script.
$1 - $9 - The first 9 arguments to the Bash script. (As mentioned above.)
$# - How many arguments were passed to the Bash script.
$@ - All the arguments supplied to the Bash script.
$? - The exit status of the most recently run process.
$$ - The process ID of the current script.
$USER - The username of the user running the script.
$HOSTNAME - The hostname of the machine the script is running on.
$SECONDS - The number of seconds since the script was started.
$RANDOM - Returns a different random number each time is it referred to.
$LINENO - Returns the current line number in the Bash script.

Similar codes

18 votes137 views6 answers
Ubuntu install composer
Shell/Bash
0 vote111 views1 answer
Snap jdk
Shell/Bash
1 vote104 views1 answer
Bcftools extract information
Shell/Bash
1 vote116 views3 answers
GImp install ubuntu terminal command
Shell/Bash
1 vote161 views1 answer
Man command not found arch
Shell/Bash
1 vote112 views1 answer
Bash concatenate files into one
Shell/Bash
0 vote126 views1 answer
Open video linux terminal
Shell/Bash
1 vote120 views1 answer
Git bash posh git
Shell/Bash
3 votes110 views1 answer
Telnet install on mac
Shell/Bash
86 votes110 views6 answers
Npm cache clean
Shell/Bash