Change the permissions    Permissions can be changed with `chmod` command. Suppose you want to change the permission for a particular file or a folder, the first approach is through `chmod` command.   Changing Ownership and Group Change the ownership of a file/directory                         Example:  chown user filename

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Linux

An operating system (OS) is the software which manages hardware and resources, like CPU, storage and memory. The OS bridges the applications and hardware and makes the connections between all of your software and the hardware resources.