Frequent question: How do you exit a script in Unix?

How do you exit a script?

If you will invoke the script with source , you can use return <x> where <x> will be the script exit status (use a non-zero value for error or false).

How do you end a shell script?

2 Answers. Try replacing the last line ( endif ) with fi , which is the correct token to close an if statement. Also, replace ($2 == “both”) with the correct [ $2 == “both” ] . Note the quotes around $2 , the spaces after [ and before ] and the ; before the then .

How do I stop a script in Linux?

You can terminate that script by pressing Ctrl+C from terminal where you started this script. Of course this script must run in foreground so you are able to stop it by Ctrl+C. Both ways should do the trick your are asking for.

What is the difference between exit 0 and exit 1 in shell script?

exit(0) indicates that the program terminated without errors. exit(1) indicates that there were an error. You can use different values other than 1 to differentiate between different kind of errors.

What is exit command?

In computing, exit is a command used in many operating system command-line shells and scripting languages. The command causes the shell or program to terminate.

What is $1 in bash script?

$1 is the first command-line argument passed to the shell script. Also, know as Positional parameters. … $0 is the name of the script itself ( $1 is the first argument (filename1) $2 is the second argument (dir1)

How do I run a shell script?

Steps to write and execute a script

  1. Open the terminal. Go to the directory where you want to create your script.
  2. Create a file with . sh extension.
  3. Write the script in the file using an editor.
  4. Make the script executable with command chmod +x <fileName>.
  5. Run the script using ./<fileName>.

What is if in shell script?

This block will process if specified condition is true. If specified condition is not true in if part then else part will be execute. To use multiple conditions in one if-else block, then elif keyword is used in shell.

How do I find out what script is running in the background in Unix?

How to find out what processes are running in the background

  1. You can use the ps command to list all background process in Linux. …
  2. top command – Display your Linux server’s resource usage and see the processes that are eating up most system resources such as memory, CPU, disk and more.

What does Pkill do in Linux?

pkill is a command-line utility that sends signals to the processes of a running program based on given criteria. The processes can be specified by their full or partial names, a user running the process, or other attributes.

Like this post? Please share to your friends:
OS Today