$(basename $0)

Shell Programming and Scripting
1

what is the meaning of "script_name=$(basename $0)", can someone please explain?

2

$0 will expand to the name of the script, as called from the command line.

# cat myscript.shell
echo $0

# ./myscript.shell
./myscript.shell

basename - strip directory and suffix from filenames.

# basename /home/bipinajith/myscript.shell
myscript.shell