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Gid linux install#
Gid linux update#
Gid linux manual#

Allocate a free ID towards the start of the range 500-1000.

Use 1000 if none of your existing systems use it for something else and you never plan on adding a new OS which accesses your filesystems.

Use something high enough like 10000, which would never end up allocated automatically.

Gid linux install#

Use 100 and hope it doesn't break if you install a system that allocates system IDs counting up from 100 like Debian.

But probably you have some shared files and you'll need to allocate a shared group ID anyway. Possible options considering your information so far: (To be clear, this is the opposite of Debian). On Fedora, it's pretty safe to assume you can allocate id 100, because the automatic allocation of id's 100-1000 actually counts down. It might not be a safe assumption to make, in case the order the groups are allocated in changes for some reason. I'm not really sure what it means that I see users as 100 on a Debian system.

Gid linux manual#

This is confirmed by the Debian Policy Manual it just doesn't have the virtue of being strictly true at the current time. UIDs 100-499 (and on all modern systems 100-999) are supposed to be allocated dynamically. LSB says that UIDs and GIDs 0-99 are statically allocated by the system. (And another group like bin with no apparent purpose in modern times). In this case it would be somewhat academic what number is assigned - it would just be another system group which varies between different distributions. My users are not necessarily a member of a shared group like this on either Fedora or Debian. I would call that the preferred approach for modern multi-user systems (I think older systems defaulted to a shared group like users as the primary group of the user instead). The way useradd works, it would allocate each user a group, and the numeric identifiers for user and group id will conveniently end up the same. On a completely new setup, you might prefer to avoid using 1000.

Restart all processes that must use the new GID.LSB specifies some group names, but users is not one of them.

Gid linux update#

If you have any configuration file or script that references the old GID, update it.If you have any archive that uses the old GID, rebuild it.find / -gid OLDGID ! -type l -exec chgrp NEWGID \ Ĭhgrp clears suid and sgid flags, restore those.

On other systems, use that system's administration tool, or vigr if available, or edit /etc/group as applicable.Ĭhange the group of all the files on your system that belong to the old group. On Linux, run groupmod -g NEWGID GROUPNAME.

Change the entry in the group database.

First, you may need to log out users in the group and kill processes who have that group as their effective, real or saved group.

However, if you do really want to change the GID, this is how: You should avoid treating the GID as significant and use group names instead you can change the name of a group with a single command (on Linux: groupmod -n NEW_GROUP_NAME OLD_GROUP_NAME). So to change the GID, you're going to have to modify all the places where that GID is used.

As far as the system is concerned, a different GID is a different group. The GID is the primary identifier of the group.