Why do we use bin sh in shell script?
/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.
What is bin bash in shell script?
@ShivanRaptor #!/bin/bash Means run this script in bash. #!/bin/sh means run this script in sh which is the default unix shell, which might be bash or any other variant like ksh, dash, zsh, etc.
What is a csh script?
Description. The C shell is an interactive command interpreter and a command programming language that uses syntax similar to the C programming language. The shell carries out commands either interactively from a terminal keyboard or from a file. The csh command invokes the C shell.
What is the difference between Bash and csh?
CSH is C shell while BASH is Bourne Again shell. 2. C shell and BASH are both Unix and Linux shells. While CSH has its own features, BASH has incorporated the features of other shells including that of CSH with its own features which provides it with more features and makes it the most widely used command processor.
What does sh do in Linux?
sh is a command language interpreter that executes commands read from a command line string, the standard input, or a specified file.
When to switch from csh to bash or zsh?
If you are using a csh relative as your login shell, switch to bash or zsh, so that the interactive command language will be the same as the scripting language you’re learning. This defines what shell (command interpreter) you are using for interpreting/running your script.
Which is the C shell or the csh shell?
g., #!/[&bin&]/[&csh&] refers to the C-shell, /[&bin&]/[&tcsh&] the t-shell, /[&bin&]/[&bash&] the [&bash&] shell, etc. You can tell which interactive shell you are using the
What does the line ” # ! / bin / sh ” mean?
If the first line is #!/bin/sh then it will consider all commands as a one script and it will show the that this file is running in ps command and not the commands inside the file. Thanks for contributing an answer to Stack Overflow!
Can you write a script in # bin / sh?
Or, as you have seen, you can use #! /bin/sh to write a script intended to be interpreted by sh. The #! line is only processed if you directly invoke the script ( ./script on the command line); the file must also be executable ( chmod +x script ).