To write a Bash script, you will need a text editor and basic knowledge of Bash commands. Here is an example of how to write a simple script that prints “Hello, World!” on the screen:
Open your favorite text editor.
Add the following line to the top of the file: !/bin/bash
This tells the system that the script should be run using the Bash shell.
Then, add the following line to the file: echo “Hello, World!”
Save the file with any name, but uk cell phone number list make sure it ends in .sh (for example: hello.sh ).
Open terminal and navigate to the directory where you saved the file.
Assign execute permissions to the file with the following command: chmod +x filename.sh
To run the script, type: bash hello.sh
Writing bash script
If everything is set up correctly, you should see the message “Hello, World!” printed on the screen. This is just a basic example, but you can add other commands and control structures to create more advanced scripts. Always remember to save the file with the .sh extension and give it execute permissions before attempting to run it.
Wait command: wait
The wait command is used in the shell to wait until all child processes have terminated before continuing with the script execution . It is usually used in conjunction with the & command to start a child process in the background.