Fails if changes have been made to the current buffer,
			unless 'hidden' is set.

			If {cmd} is omitted, and the 'shell' job exits with no
			error, the buffer is closed automatically
			|default-autocmds|.

			To enter |Terminal-mode| automatically: >
			      autocmd TermOpen * startinsert
<
							*:!cmd* *:!*
:!{cmd}			Execute {cmd} with 'shell'. See also |:terminal|.
			For the filter command, see |:range!|.

			The command runs in a non-interactive shell connected
			to a pipe (not a terminal). Use |:terminal| to run an
			interactive shell connected to a terminal.

			Backgrounded ("&") commands must not write to stdout
			or stderr, the streams are closed immediately. |E5677|
			Use |jobstart()| instead. >
				:call jobstart('foo', {'detach':1})
<
			For powershell, chaining a stringed executable path
			requires using the call operator (&). >
				:!Write-Output "1`n2" | & "C:\Windows\System32\sort.exe" /r
<
			Vim builds command line using options 'shell', 'shcf',
			'sxq' and 'shq' in the following order:
			`&sh &shcf &sxq &shq {cmd} &shq &sxq`
			So setting both 'sxq' and 'shq' is possible but rarely
			useful.  Additional escaping inside `{cmd}` may also
			be due to 'sxe' option.

			Also, all |cmdline-special| characters in {cmd} are
			replaced by Vim before passing them to shell.

							*E34*
			Any "!" in {cmd} is replaced with the previous
			external command (see also 'cpoptions'), unless
			escaped by a backslash.  Example: ":!ls" followed by
			":!echo ! \! \\!" executes "echo ls ! \!".

			Any "|" in {cmd} is passed to the shell, you cannot
			use it to append a Vim command.  See |:bar|.

			Any "%" in {cmd} is expanded to the current file name.
			Any "#" in {cmd} is expanded to the alternate file name.
			Special characters are not escaped, use quotes or
			|shellescape()|: >
				:!ls "%"
				:exe "!ls " .. shellescape(expand("%"))
<
			Newline character ends {cmd} unless a backslash
			precedes the newline.  What follows is interpreted as
			another |:| command.

			After the command has been executed, the timestamp and
			size of the current file is checked |timestamp|.

			If the command produces too much output some lines may
			be skipped so the command can execute quickly.  No
			data is lost, this only affects the display.  The last
			few lines are always displayed (never skipped).

			To avoid the hit-enter prompt use: >
				:silent !{cmd}
<
							*:!!*
:!!			Repeat last ":!{cmd}".

							*:ve* *:ver* *:version*
:ve[rsion]		Print editor version and build information.
			See also |feature-compile|.

							*:redi* *:redir*
:redi[r][!] > {file}	Redirect messages to file {file}.  The messages which
			are the output of commands are written to that file,
			until redirection ends.  The messages are also still
			shown on the screen.  When [!] is included, an
			existing file is overwritten.  When [!] is omitted,
			and {file} exists, this command fails.

			Only one ":redir" can be active at a time.  Calls to
			":redir" will close any active redirection before
			starting redirection to the new target.  For recursive
			use check out |execute()|.

			To stop the messages and commands from being echoed to
			the screen, put the commands in a function and call it
			with ":silent call Function()".
			Alternatives are the 'verbosefile' option or
			|execute()| function, these can be used in combination
			with ":redir".

:redi[r] >> {file}	Redirect messages to file {file}.  Append if {file}
			already exists.

:redi[r] @{a-zA-Z}
:redi[r] @{a-zA-Z}>	Redirect messages to register {a-z}.  Append to the
			contents of the register if its name is given
			uppercase {A-Z}.  The ">" after the register name is
			optional.
:redi[r] @{a-z}>>	Append messages to register {a-z}.

:redi[r] @*>
:redi[r] @+>		Redirect messages to the selection or clipboard. For
			backward compatibility, the ">" after the register
			name can be omitted. See |quotestar| and |quoteplus|.
:redi[r] @*>>
:redi[r] @+>>		Append messages