Then, add the following line to the file: echo “Hello, World!” Save the file with any name, but 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 business owner database 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. command is: wait [pid] Where pid is the process number of the child process you want to wait for. If you do not specify a pid, the wait command will wait until all child processes have finished.