One Linux command per day (+): Chgrp,chown,chmod

These three commands are changed file attributes and permissions, put together to write

Charp: Changing the user group to which the file belongs

Chown: Change the file owner

chmod: Changing the permissions of a file

A file for Owner,group, others have different permissions, chmod is used to change the permissions, each identity has three permissions, respectively, is r,w,x

The score for each permission is R:4 w:2 x:1, which can be summed, for example, when the permission is rwx 7

So the simplest way to change permissions is chmod 777 filename

One Linux command per day (+): Chgrp,chown,chmod