KornShell
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The KornShell (ksh) is a standard/restricted command and programming language developed by AT&T.
Installation
First, install an implementation from the official repositories:
- MirBSD™ Korn Shell — Enhanced version of the public domain ksh.
More implementations are provided in the Arch User Repository:
- loksh — A Linux port of OpenBSD's ksh
- Public Domain Korn Shell — Clone of the AT&T Korn shell. At the moment, it has most of the ksh88 features, not much of the ksh93 features, and a number of its own features.
- http://www.cs.mun.ca/~michael/pdksh/[dead link 2020-03-29 ⓘ] || pdkshAUR
- AT&T Korn shell — Official AT&T version.
- OpenBSDs Korn Shell — Porting of the OpenBSD version of ksh to GNU/Linux.
- http://www.connochaetos.org/oksh/[dead link 2020-03-29 ⓘ] || okshAUR
Making m/ksh your default login shell
Change the default shell for the current user:
$ chsh -s /bin/mksh
Uninstallation
Change the default shell before removing the mksh package.
Warning: Failure to follow the below procedure may result in users no longer having access to a working shell.
Run following command:
$ chsh -s /bin/bash user
Use it for every user with m/ksh set as their login shell (including root if needed). When completed, the mksh package can be removed.
Alternatively, change the default shell back to Bash by editing /etc/passwd
as root.
Warning: It is strongly recommended to use
vipw
when editing /etc/passwd
as it helps prevent invalid entries and/or syntax errors.For example, change the following:
username:x:1000:1000:Full Name,,,:/home/username:/bin/mksh
To this:
username:x:1000:1000:Full Name,,,:/home/username:/bin/bash