Special variables in shell

Special variable $0 script name in shell $1 location parameter #1 $2-$9 Location parameter #2-#9 $ {10} location parameter #10 $ # Number of location parameters & quot; $ * & quot; all location parameters (as a single string) & quot ;@ @ & quot; all location parameters... special variable $0 script name in shell $1 location parameter #1 $2-$9 Location parameter #2-#9 $ {10} location parameter #10 $ # Number of location parameters "$ *" all location parameters (as a single string) "$ @" all location parameters (each as an independent string) $ {#*} number of command line parameters passed to the script $ {#@} number of command line parameters passed to the script $? Returned Value $ PID of the script $-flag passed to the script (use set) $ _ the last parameter of the previous command $! ID of the process (PID) of the last job running in the background)