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

1 vote185 views2 answers
Check if service in running to a port in linux
Shell/Bash
14 votes221 views2 answers
Install selenium python
Shell/Bash
1 vote192 views1 answer
Linux record camera
Shell/Bash
1 vote188 views1 answer
Telnet command
Shell/Bash
0 vote187 views1 answer
Start networking ubuntu recovery
Shell/Bash
0 vote196 views1 answer
Ubuntu power saving
Shell/Bash
0 vote198 views1 answer
Kali linux side menu bar disappeared
Shell/Bash
0 vote202 views1 answer
Nginx: invalid option: "restart"
Shell/Bash
1 vote191 views1 answer
Move folders in powershell
Shell/Bash
1 vote204 views1 answer
What command do you use to pull any changes from the master repository into your local repository?
Shell/Bash