echo $0 or
echo ${0}
$0 will contain the name of your shell script.
Other useful variables in Shell Script:
- $$ = The PID number of the process executing the shell.
- $? = Exit status variable.
- $0 = The name of the command you used to call a program.
- $1 = The first argument on the command line.
- $2 = The second argument on the command line.
- $n = The nth argument on the command line.
- $* = All the arguments on the command line.
- $# The number of command line arguments.
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