Enable and disable shell built in commands.

Enable command allows you to enable and disable your shell built in commands.

View the shell built in commands using

[root@tester ~]# enable
enable .
enable :
enable [
enable alias
enable bg
enable bind
enable break
enable builtin
enable caller
enable cd
enable command
enable compgen
enable complete
enable continue
enable declare
enable dirs
enable disown
enable echo
enable enable
enable eval
enable exec
enable exit
enable export
enable false
enable fc
enable fg
enable getopts
enable hash
enable help
enable history
enable jobs
enable kill
enable let
enable local
enable logout
enable popd
enable printf
enable pushd
enable pwd
enable read
enable readonly
enable return
enable set
enable shift
enable shopt
enable source
enable suspend
enable test
enable times
enable trap
enable true
enable type
enable typeset
enable ulimit
enable umask
enable unalias
enable unset
enable wait

Disable the commands using -n option

[root@tester ~]# enable -n history
[root@tester ~]# history
bash: history: command not found.

[root@tester ~]# history

Enable the commands using -a option.

145  enable -a history
  146  history
  147  enable
  148  man command
  149  enable -n history
  150  history
  151  enable -a history
  152  history | less
 153   history


You can also view using the set command . For more options you can check with man page.

[root@tester ~]# set -o
allexport       off
braceexpand     on
emacs           on
errexit         off
errtrace        off
functrace       off
hashall         on
histexpand      on
history         on
ignoreeof       off
interactive-comments    on
keyword         off
monitor         on
noclobber       off
noexec          off
noglob          off
nolog           off
notify          off
nounset         off
onecmd          off
physical        off
pipefail        off
posix           off
privileged      off
verbose         off
vi              off
xtrace          off