How much do you know about Chmod? Chmod, which sets read, write, and execute permissions, is one of the most important Linux security commands.
Every object on your Linux system has a permission mode that describes what actions a user can perform on it. There are three types of permissions: read (r), write (w), and execute (x).
Toreada file is to view its contents. For example, a text file must havereadpermission for someone to read the text within. If the user wants to add a sentence to that file, it needswritepermission. Theexecutepermission enables someone to run a file, such as a shell script or a binary program file.
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