Special Variables | Shell Scripting Tutorial For Beginners-32

$* it stores the complete set of positional parameters as a single string



$# It is set to the number of arguments specified



$1 first argument



$2 second argument



$0 name of executed command



"$@" each quoted string treated as a seperate argument



$? exit status of last command



$$ PID of the current shell



$! PID of the last background job