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File permission


File permission is one of the security features of Linux system.

File permission put validation on file.

Permission groups in file permission:

1.     Owner (u) - Owner permission put validation on owner only, other users are not affected by it.

2.   Group (g)- Group permission put validation on group which include file, other groups are not affected by it.

3.    All users (o or a)- This type of permission is followed on all the groups.

File permission types:

1.      Read (r)- it gives file read permission to the user.

2.    Write (w) - it gives file write permission to the user.

3.    Execute (x)- it gives file execute permission to the user.