Code:
gcc
gcc: no input files
Code:
grep
Usage: grep [OPTION]... PATTERN [FILE]...
Try `grep --help' for more information.
Code:
cp
cp: missing file operand
Try `cp --help' for more information.
Code:
sudo
usage: sudo -h | -K | -k | -L | -V
usage: sudo -v [-AknS] [-p prompt]
usage: sudo -l[l] [-AknS] [-g groupname|#gid] [-p prompt] [-U username] [-u
username|#uid] [-g groupname|#gid] [command]
usage: sudo [-AbEHknPS] [-C fd] [-g groupname|#gid] [-p prompt] [-u
username|#uid] [-g groupname|#gid] [VAR=value] [-i|-s] [<command>]
usage: sudo -e [-AknS] [-C fd] [-g groupname|#gid] [-p prompt] [-u
username|#uid] file ...
...you now see the value in passing arguments to programs.