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Need ksh in cygwin

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# 1  
Old 06-22-2019
Need ksh in cygwin
Hi All,

I have installed cygwin64 terminal. I would like to have ksh shell as well. But i dont find any ksh files in /bin dir of cygwin. Pl. help on how to install ksh in cygwin. Its for my training purpose.I am using windows 7 64 bit .
# 2  
Old 06-22-2019
The default shell in brand new cygwin is dash. That is what you have unless you've changed it to bash. Because: The newest version of Korn shell is not in the public domain. You cannot download it legally, AFAIK. dash is pretty close to ksh and I believe it is POSIX compliant. There are other available shells like this. Many have extensions you may or may not want. One match is pdksh - public domain version of ksh. The cygwin site has pdksh.

To make pdksh or dash invoke just like ksh create a symlink. Example:/bin/ksh -> /usr/bin/pdksh

See: Almquist shell - Wikipedia - go to the DASH section.
Last edited by jim mcnamara; 06-22-2019 at 11:46 AM..
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dodona Neo
# 3  
Old 06-22-2019
I had the same issue/question awhile back...
After a bit of digging, I installed mksh which "links/hides" itself as ksh:
Code:
$ which ksh
/usr/bin/ksh

$ ls -lrt /usr/bin/ksh
lrwxrwxrwx 1 LP-VGERSHKO-W7+vg_local LP-VGERSHKO-W7+None 8 Apr 19  2018 /usr/bin/ksh -> mksh.exe

man mksh yields:
Code:
MKSH(1)                   BSD General Commands Manual                  MKSH(1)

NAME
     mksh, sh - MirBSD Korn shell

SYNOPSIS
     mksh [-+abCefhiklmnprUuvXx] [-T [!]tty | -] [-+o option] [-c string | -s
          | file [argument ...]]
     builtin-name [argument ...]

DESCRIPTION
     mksh is a command interpreter intended for both interactive and shell
     script use.  Its command language is a superset of the sh(C) shell lan
     guage and largely compatible to the original Korn shell.  At times, this
     manual page may give scripting advice; while it sometimes does take por
     table shell scripting or various standards into account all information
     is first and foremost presented with mksh in mind and should be taken as
     such.

I don't quite remember if mksh was a separate Cygwin package or not...
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RavinderSingh13 wisecracker
# 4  
Old 06-23-2019
Quote:
Originally Posted by jim mcnamara
The default shell in brand new cygwin is dash. That is what you have unless you've changed it to bash. Because: The newest version of Korn shell is not in the public domain.
When did the default shell become 'dash'?
I have searched the official CygWin site and can find nothing on it.
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