This README provides an introduction to the fundamentals of Bash scripting, covering essential concepts and syntax to help you write and understand Bash scripts.
- Overview
- Script Structure
- Shebang
- Comments
- Variables
- Conditional Statements
- Loops
- Functions
- Running a Bash Script
- Contributing
- License
Bash (Bourne Again SHell) is a widely-used shell and command language interpreter in Unix and Linux operating systems. Bash scripts are sequences of commands written in the Bash language and executed in a Bash environment.
This README provides a basic understanding of Bash scripting, covering key aspects such as script structure, syntax, variables, conditionals, loops, functions, and how to run a Bash script.
A Bash script typically follows this structure:
#!/bin/bash
# Your script commands here
# ...
The #!/bin/bash
line, known as the shebang, tells the system to use Bash to interpret the script.
Comments in Bash start with #
and are used to annotate the script with human-readable information. Comments are ignored during script execution.
Variables in Bash are assigned using the syntax variable_name=value
. Example:
greeting="Hello, World!"
echo $greeting
-
If-else statement:
if [ condition ]; then # commands if condition is true else # commands if condition is false fi
-
Case statement:
case $variable in pattern1) # commands for pattern1 ;; pattern2) # commands for pattern2 ;; *) # default commands ;; esac
-
For loop:
for i in {1..5}; do # commands done
-
While loop:
while [ condition ]; do # commands done
Functions in Bash are defined and called using the following syntax:
function_name() {
# function body
}
# Call the function
function_name
-
Make the script executable:
chmod +x script_name.sh
-
Run the script:
./script_name.sh
Contributions and feedback are welcome! Feel free to open issues or submit pull requests if you have any suggestions or improvements.
This project is licensed under the MIT License.