(bash): The most useless commands (5) | bash builtin commands

[if you are looking for the builtin commands of jshell: read this posting]

In a comment Albert Godfrind pointed out, that the commands i was talking about like

1. rev
2. yes
3. sl
4. cowsay

are not really bash commands (in a way that they will be installed within the installation of the bash shell). They are commands, which can be used from on every shell. So my headline is a little bit missleading - thanks for this notice.

Just for clarification here a list with all bash builtin commands:

• alias
• bind
• builtin
• caller
• command
• declare
• echo
• enable
• help
• let
• local
• logout
• mapfile
• printf
• read
• readarray
• source
• type
• typeset
• ulimit
• unalias

and the bourne shell builtins:

• break
• cd
• continue
• eval
• exec
• export
• getopts
• hash
• pwd
• readonly
• return
• shift
• test
• times
• trap
• umask
• unset

Still missing:

• Job Control Builtins
  like bg, fg, kill, ...
• Directory Stack Builtins
  dirs, popd, pushd
• History Builtins
  fc, history
• Programmable Completion Builtins
  compgen, complete, compopt