forked from pifty/tutes-dump
30 lines
1.2 KiB
Plaintext
Executable File
30 lines
1.2 KiB
Plaintext
Executable File
[02] WHAT ARE UNIX FILE PERMISSIONS AND HOW DO THEY WORK?
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UNIX treats directories, paging, memory, hardware devices, nearly
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everything as a FILE. Files have modes, and here they are explained.
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NOTE, this is just basic information and not complete. The following
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should be all you need to know about UNIX FILES.
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u g o l owner group bytes date file
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---------------------------------------------------------------
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drwxr-xr-x 7 nova users 352 Jul 11 1992 /udd/nova
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UNIX treats everything (devices, directories, et cetera) as a file.
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u = user
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g = group
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o = other (everyone else)
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l = links
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d = directory
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t = sticky bit
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p = pipe
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owner = the user id who owns the file
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group = the group that owns the file
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You can use the chown, chmod and chgrp commands to modify files
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chmod (change mode) allows you to alter the permissions of a file
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using "u,g,o" .. for instance: chmod ou-rx /udd/nova would make
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the above file unreadable to other users and users in the "users"
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group. chmod ou+rwx /udd/nova would give all other users access
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to your directory (read and write).
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