Shell scripting in Linux involves writing a series of commands in a text file, which can then be executed in the command-line interface (CLI) of the Linux operating system. These scripts can be used to automate repetitive tasks, manage system resources, and perform other functions.
The shell is a command-line interface that allows users to interact with the operating system. There are different types of shells available in Linux, such as Bash, Zsh, Ksh, and others. Bash (Bourne-Again SHell) is the most commonly used shell and is the default shell in most Linux distributions.
Shell scripts can be written in any text editor, such as vi, nano, or gedit, and must be saved with the ".sh" extension. Once a shell script has been created, it can be executed by typing its filename into the command line. Before execution, the script file must be given executable permission using the "chmod" command.
Here are some examples of shell scripting in Linux:
Backup script: A shell script can be used to create backups of important files and directories on a regular basis. This can be done using the "tar" command, which creates a compressed archive of the specified files and directories.
System monitoring script: A shell script can be used to monitor system resources such as CPU usage, memory usage, and disk space. The script can use commands such as "top", "free", and "df" to gather this information and display it in a meaningful way.
User management script: A shell script can be used to automate the process of adding or removing users from the system. The script can use commands such as "useradd" and "userdel" to create or delete user accounts.
File renaming script: A shell script can be used to rename files in bulk. The script can use the "mv" command to rename files based on a specified pattern.
Web server log analysis script: A shell script can be used to analyze web server logs and extract useful information such as the number of hits, the most popular pages, and the source of the traffic. The script can use commands such as "grep" and "awk" to parse the log files and generate reports.
These are just a few examples of the many ways in which shell scripting can be used in Linux. With a little practice and experimentation, you can create your own shell scripts to automate tasks and improve your productivity.
****Feel free to share what script you,ve tried today****