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File Systems & Permissions
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Permissions: rwx
Every file has three sets of permissions: Owner, Group, and Others. Each set has three types of access:
- r (Read): Can view contents.
- w (Write): Can modify or delete.
- x (Execute): Can run the file as a program.
Numeric Mode (chmod): Permissions are often set using numbers.
- Read = 4, Write = 2, Execute = 1.
- Example:
chmod 755 filemeans:- Owner (7 = 4+2+1): Read, Write, Execute.
- Group (5 = 4+0+1): Read, Execute.
- Others (5 = 4+0+1): Read, Execute.