Hello.
I have a directory and want to set different permission on it. For example, "user1" just can Read it and "user2" can Read\Write. Should I use "setfacl"?


Thank you.

Yes, if you have two groups with different permissions and the Other to have no access at all. However, if you can set Other to rx then you will not need setfacl. ACLs complicate maintenance quite a bit.

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Absolutely agree with Turbocapitalist ... I have to use ACLs in several cases and while it does solve the problem, it does indeed complicate things. In certain cases, there is no way around it and you must use ACLs. If at all possible to just go with standard ownership and permission management (user-group-others), stick with that if you can.

Can you show me an example?

Like this:

The Other category includes any account on the system. If that is no good for you then you'll have to use ACLs to have two groups with different settings.

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Sure ... if you mean giving specific permissions to a directory using ACLs ... the command would look something like this (as root) :

... this would give user "hack3rcon" read-write-execute access (full) to directory "directoryname" and all of its contents (the -R option means recursive ..).

However, the one of the complicated parts comes when you change the contents of the directory after have applied the ACLs ... The new files/subdirectories do not automatically inherit these specific permissions (at least I haven't found a way to do this with ACLs), meaning you have to apply them again ...

You can set a default ACL on a directory, and that list does get inherited.

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Interestingly, the default ACL can cover more than one group.

This IS good to learn ... Thanks rknichols.

Thank you.
For other users I can write:
?

In this example, the "root" user is a member of "agroup" and has "rwx" permission but other members of "agroup" have "rwxs" and other users "rx" ?

If you want the directories to inherit the ACLs then you'll need to set them as defaults.

Or something like that.

"root" is independent of "agroup". It just helps to have a directory owned by root to make it clear that the permissions are elsewhere in my opinion.

Did this " # setfacl -R -m "u:hack3rcon2:r" directoryname " work for anyone ?

... please keep in mind that in this example from my post, both "hack3rcon" and "directoryname" should be replaced by whichever username and directory one is operating on ... (hence the italics in my post ...).

... just to be clear :-)