Date: Mon, 25 Nov 2019 13:43:41 -0800
From: Peter Benjamin <p...@peterbenjamin.com>
Message-ID:
<4dc457e0135603025cd500acdc95db53f9d30482.ca...@peterbenjamin.com>
| Description:
| 'in' is a builtin command and is not listed in the man page as such.
Others have indicated what it is, but just for completeness, the man
page *does* include it...
RESERVED WORDS
Reserved words are words that have a special meaning to the shell. The
following words are recognized as reserved when unquoted and either the
first word of a simple command (see SHELL GRAMMAR below) or the third
word of a case or for command:
! case coproc do done elif else esac fi for function if in select
then until while { } time [[ ]]
If you really have some burning desire to use "in" (or any of the others
listed there) as a command name (I doubt any will ever become any kind of
builtin, that would be bizarre) in bash or any other Bourne-type shell
(they *all* treat in as a reserved work) you can change the word (as your
./in did) or quote it somehow, like
'in' "in" \in i\n \i\n
kre
ps: you really should read the whole manual page, beginning to end.
