If the -delete action is at the first position, during its evaluation, itвЂ™ll delete the given directory and everything in it, which is the test directory in our example. However, we shouldnвЂ™t forget that find treats them as three expressions as well.ДЄn expression in the find command will be evaluated, returning a boolean value, and the -delete action always returns true. We can call the three options: -delete, -type d, and -name вЂ.gitвЂ™. However, when we check the result, weвЂ™ve found that the test directory has been deleted completely! LetвЂ™s understand why it has happened. It means the command has been executed successfully. Ls: cannot access 'test': No such file or directory Now, letвЂ™s re-order the options in our last find command by moving the -delete option to the first position and see what will happen: $ find test -delete -type d -name '.git' We know that the order of options of a Linux command doesnвЂ™t usually matter.ДЇor example, the following two ls commands are identical, even though the options are in a different order: ls -F -a -l -color

These commands ignore the Stdin.ДЇor instance, when we execute the command вЂњ rm fileвЂњ, rm accepts the command-line argument file, which is indicating a file. Typical examples are those commands doing file handling, for example, cp, mv, and rm. However, not all Linux commands support reading from Stdin. We can see this kind of вЂњcommand chainвЂќ pretty often in the real world. We can pipe the Stdout to further commands that support reading from Stdin, for example: $ ls -1 / | grep '^m' | sed 's/^m/OK_m/'

This command works because the grep command accepts reading from the Stdin. Simply put, here, the pipe converts the standard output (Stdout) of ls to standard input (Stdin) of the grep command. In the simple example above, we pipe the ls commandвЂ™s result to grep and find out the root directories whose names begin with вЂњmвЂќ.

First of all, letвЂ™s see an example: $ ls -1 / | grep '^m' We need to understand what the pipe does before we answer this question.

Grep for file type and delete