So basically what does permission means. To do anything in Linux there is a requirement of Permissions(Read ,Write, Execute permissions).
Owner, Group and Other Users can invoke permissions and permissions can be changed by the below command.
chmod
Syntax:
chmod 764 file.txt
First 7 denotes Read Write Execute permissions to Owner.
Second 6 denotes Read Write permissions to Group and not Execute permissions.
Third 4 denotes Read permissions to other Users and not write and execute permissions.
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