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What are the file permissions and access modes in Unix?

Answer»

There are THREE TYPES of permissions – owner, group and other (public), all of which can be listed using the command ls -l. Each USER can have one or more of the following access – read (r), write (w), execute (X). Example, -rwxr-xr-- represent the file permissions for owner, members and everyone else as –

  • Characters 2-4 (rwx) – means the owner has read, write and execute permission,
  • Characters 5-7 (r-x) – indicates that the group has read and EXECUTED permission,
  • Characters 8-10 (r--) – indicates that everyone else has only read permissions.


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