AIX

My current stat is as follows
drwxrwsr-x 176 user_a group1 16384 Dec 14 10:11 .
drwxr-xr-x 4 user_a group1 4096 Feb 28 2006 ..
drwxrwsr-x 5 user_c group1 4096 Feb 25 2010 folderx

My user is user_g and member of groups=group1,group2
and i try to
chgrp group2 folderx
and i got the following message
chgrp: folderx: Operation not permitted.

My questions are
- Why I've got that message ?
- How can I change the group name with user user_g ?

Thanks
skfn

You have to be owner of the file, or root to do this.

if you are currently connected as user_g and want to use another GID group for which your user is granted to,
you can switch of gid using the newgrp command


Depending on the OS you may encounter some restriction changing the set gid bit on a directory, and you should use chmod with letter notation (ugo+-rwx ..) because doing this using octal notation like a chmod 2775 ... won't work.
I don't know whether it is the case or not on your OS, refer to the man chmod

You have to be owner of the file, or root to do this.

why i can't do it with a user which is a member in both groups?

---------- Post updated at 06:35 AM ---------- Previous update was at 06:35 AM ----------

why i can't do it with a user which is a member in both groups?

---------- Post updated at 08:01 AM ---------- Previous update was at 06:35 AM ----------

The "newgrp" command is used to change the primary group
this is not the case .

---------- Post updated at 08:02 AM ---------- Previous update was at 08:01 AM ----------

The "newgrp" command is used to change the primary group
this is not the case .

I think you should direct that question to the creators of Unix...

Being the owner of the file may not be sufficient. you need to be root for that.
Make sure it is not on a read-only FS nor an NFS one.

because that is how it works. ACLs may support what you require. see the AIX documentation for details.