Contents
Who created Bin sh shell?
Kenneth Almquist
Almquist shell (also known as A Shell, ash and sh) is a lightweight Unix shell originally written by Kenneth Almquist in the late 1980s. Initially a clone of the System V.
What is Bourne shell in Linux?
The Bourne shell is the original UNIX shell (command execution program, often called a command interpreter) that was developed at AT. Bourne Again Shell (Bash) is the free version of the Bourne shell distributed with Linux systems. Bash is similar to the original, but has added features such as command line editing.
What is TCSH shell Linux?
The tcsh shell is an enhanced but completely compatible version of the Berkeley UNIX C shell, tcsh. It is a command language interpreter usable both as an interactive login shell and a shell script command processor.
Is bin sh shell?
/bin/sh is an executable representing the system shell and usually implemented as a symbolic link pointing to the executable for whichever shell is the system shell. In last couple of years, Debian (and Ubuntu) decided to switch the system shell from bash to dash — a similar shell but lighter and much faster.
Who is the creator of the Almquist shell?
Almquist shell (also known as A Shell, ash and sh) is a lightweight Unix shell originally written by Kenneth Almquist in the late 1980s. Initially a clone of the System V.4 variant of the Bourne shell, it replaced the original Bourne shell in the BSD versions of Unix released in the early 1990s.
Why was the Almquist shell not compatible with POSIX?
Fast, small, and virtually compatible with the POSIX standard’s specification of the Unix shell, ash did not provide line editing or command history mechanisms, because Almquist felt that such functionality should be moved into the terminal driver. However, current variants support it.
What kind of shell is used in NetBSD?
Note that under Linux, most scripts seem to use at least some bash-specific syntax. The Slackware setup scripts are a notable exception, since ash is the shell used on the install disks. NetBSD uses ash as its /bin/sh. Myriad forks have been produced from the original ash release.
When did Herbert Xu port ash to Debian?
In 1997 Herbert Xu ported ash from NetBSD to Debian Linux. In September 2002, with release 0.4.1, this port was renamed to dash (Debian Almquist shell). Xu’s main priorities are POSIX conformance and slim implementation. Because of these two priorities it became very influential in the Linux world.