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How does bash scripting work?
A Bash script is a plain text file which contains a series of commands. These commands are a mixture of commands we would normally type ouselves on the command line (such as ls or cp for example) and commands we could type on the command line but generally wouldn’t (you’ll discover these over the next few pages).
Why do we use bash scripts?
Bash scripts can be used for various purposes, such as executing a shell command, running multiple commands together, customizing administrative tasks, performing task automation etc. So knowledge of bash programming basics is important for every Linux user.
What is bash commands?
Bash is a Unix shell and command language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell. First released in 1989, it has been used as the default login shell for most Linux distributions. Bash can also read and execute commands from a file, called a shell script.
What do you need to know about Bash scripting?
Bash Shell Scripting Definition Bash Bash is a command language interpreter. It is widely available on various operating systems and is a default command interpreter on most GNU/Linux systems. The name is an acronym for the ‘Bourne-Again SHell’. Shell Shell is a macro processor which allows for an interactive or non-interactive command execution.
How to execute bash script in the terminal?
It provides bash command to execute Bash script files. If we use –version flag with bash command, it should print the version of Bash interpreter. By typing Bash code directly in your terminal, it will get executed on Bash interpreter. In the above example, we have created john.txt file using touch command and later mike.txt and jenna.txt at once.
How to define a bash script as an interpreter?
To define your script’s interpreter as Bash, first locate a full path to its executable binary using which command, prefix it with a shebang #! and insert it as the first line of your script. There are various other techniques how to define shell interpreter, but this is a solid start.
What can you do with a shell script?
A shell script is a fully-fledged programming language in itself. It can define variables, functions and we can do conditional execution of shell commands as well.