UNIX Shells

bourne (sh)
c shell (csh)
korn (ksh)
bourne again shell (bash)
TC shell (tcsh)

There are basically 2 types of UNIX shells
1) Bourne Shell
2) C Shell
sh, bash, ksh, bash are Bourne Shell compatible & csh, tcsh are CShell compatible.

There are 2 Shell categories

1.Bourne shell
Bourne shell compatible
*Bourne shell (sh)
*Almquist shell (ash
*Bourne-Again shell (bash)
*Debian Almquist shell (dash)
*Public domain Korn shell (pdksh)
*MirBSD Korn shell (mksh)
*Z shell (zsh)
*Busybox


2.C shell
C shell compatible
*C shell (csh)
*TENEX C shell (tcsh)
*Hamilton C shell

3.Other shell
*Friendly interactive shell (fish):
*Perl Shell (psh)
*wish

Bourne shell is most widely used unix shell. The executable program sh in the /bin directory is the
Bourne shell.
Different types of shells:
1. Bourne shell
2. cshell
3. korn shell

sh indicates - Bourne Shell
csh if present indicates - C Shell
ksh if present indicated - Korn Shell

$cat /etc/shells <--from linux

There is a lot of shell available in UNIX.
Ex:- Bourne shell, Bash shell, CShell, Korn shell etc.