Bash Script – Difference between Bash Script and Shell Script
In computer programming, a script is defined as a sequence of instructions that is executed by another program. A shell is a command-line interpreter of Linux which provides an interface between the user and the kernel system and executes a sequence of instructions called commands. A shell is capable of running a script. A script that is passed to a shell is known as a shell script.
A Bash Script is just like a simple text file, consisting of a number of commands that we usually write in a command line. In Linux file systems, they are used for doing repetitive tasks. A Bash Script may contain a number of commands, or it might contain elements like loops, functions, conditional constructs, etc. In simple words, a Bash script is a computer program that is written in the Bash programming language.
Some of the features of Bash are given below:
- Bash can be invoked by single-character command-line options as well as multi-character command-line options. For example, (-a, -b) is a single-character command-line, and –debugger is a multi-character command-line option.
- Bash consists of Key bindings.
- Bash provides one-dimensional arrays with the help of which we can easily manipulate the lists of data.
- Bash provides control structures. For example, construct structure, etc.
#!/bin/bash myString="GeeksforGeeks" echo "myString: $myString"
Shell is considered as a special user program that provides a platform or interface to users so that they can use operating system services. Users can provide human-readable commands to a shell and then shell convert them into kernel understandable form. A shell is considered a command language interpreter that can execute commands which can be read from input devices like a keyboard.
Some of the features of a Shell are given below:
- Wildcard substitution in file names (pattern-matching): To carry out commands on a bunch of files by mentioning a pattern to match rather than mentioning an actual file name.
- Background processing: To make lengthy tasks run in the background in order to free the terminal for concurrent interactive processing.
- Piping: To combine any number of commands together in order to form a complex program. The output of one program becomes the input of another command.
- Shell variable substitution: It stores the data in user-defined variables and predefined shell variables.
Now a shell can accept a number of commands through a file, known as a shell script. A shell script contains a number of commands that are executed by a shell. For example,
#!/bin/sh myString="GeeksforGeeks" echo "myString: $myString"
Table of difference between bash script and shell script
|Sr. No.||Bash script||Shell script|
|01||The bash script is a script that is specifically created for Bash.||The shell script is a script that can be executed in any shell.|
|02||Bash scripting is a subset of shell scripting.||Shell scripting is a method to automate tasks as a collection of commands.|
|03||The bash script is one form of shell script.||Shells may be one of Korn, C shell, Bourne, Bash, etc.|
|04||Bash is an acronym for Bourne Again SHell and was developed by Brian Fox.||Shell is considered the original Unix shell developed by Stephen Bourne.|
|05||Bash has more features as compared to Shell.||Shell has fewer features as compared to Bash.|
|06||We can use shebang, “#!/bin/sh” if we want to use sh.||We can use shebang, “#!/bin/bash” if we want to use Bash if available.|
|07||Bash is more programmer-friendly as compared to shell.||Shell is less programmer-friendly as compared to Bash.|