So far, all you’ve seen in the if statement line are normal shell commands. You might be wondering if the bash if-then statement has the ability to evaluate any condition other than a command’s exit status code. The answer is no, it can’t. However, there’s a...

In the if-then statement, you have only one option for whether a command is successful. If the command returns a non-zero exit status code, the bash shell just moves on to the next command in the script. In this situation, it would be nice to be...

The most basic type of structured command is the if-then statement. The if-then statement has the following format: Syntax if command then commands fi

Sometimes, you want to save the output from a command instead of just having it displayed on the monitor. The bash shell provides a few different operators that allow you to redirect the output of a command to an alternative location (such as a file). Redirection...

To place shell commands in a text file, first you need to use a text editor to create a file and then enter the commands into the file. When creating a shell script file, you must specify the shell you are using in the first line...