Enable and disable builtin shell commands.
Syntax
enable [-a] [-dnps] [-f filename] [name …]
Key
-a List each builtin with an indication of whether or not it is enabled.
-d Delete a builtin loaded with '-f'.
-f Load the new builtin command name from shared object filename, on systems that
support dynamic loading.
-n Disable the names listed, otherwise names are enabled.
-p Print a list of shell builtins, default if no name arguments appear.
With no other arguments, the list consists of all enabled shell builtins.
-s Restrict to enable only POSIX special builtins
Disabling a builtin allows a disk command which has the same name as a shell builtin to be executed without specifying a full pathname, even
though the shell normally searches for builtins before disk commands.
If there are no options, a list of the shell builtins is displayed.
If '-s' is used with '-f', the new builtin becomes a special builtin.
The return status is zero unless a name is not a shell builtin or there is an error loading a new builtin from a shared object.
To use the test binary found via $PATH instead of the shell builtin version:
$ enable -n test
“You see things; and you say 'Why?' But I dream things that never were; and I say 'why not?' ~ George Bernard Shaw
builtin - Run a shell builtin.
chroot - Run a command with a different root directory.
exec - Execute a command.
nohup - Run a command immune to hangups.
su - Run a command with substitute user and group id.
watch - Execute/display a program periodically.
.source - Run commands from a file.