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Full Discussion: User id modification
Operating Systems Solaris User id modification Post 302485396 by achenle on Wednesday 5th of January 2011 06:07:56 AM
Old 01-05-2011
Quote:
Originally Posted by sboots
Run something like this after you change the users uid to see if any files that were owned by the old uid and change them using the second command.

make note of the users uid before you change it.

Code:
find / -user olduid

This will search the entire system for all files that were owned by that user which will now be owned by the old uid.
now change ownership of the file that is owned by the old uid to the new username
Code:
chown user:group filename

The problem is the OP has multiple users that have the same uid, so there's no way to automatically assign one uid to another since there's no context-free mapping.

For any given file, you can't really know which new user to assign the file ownership to because there's more than one possibility with no way to figure out which one is correct. You can probably assume if it's under the user's home directory that it's owned by that user, and maybe some other context-specific information is available, but in general there's no way to tell.

jlliagre's post didn't explicitly state that issue. FWIW, I like m.d.ludwig approach of giving all the users with overlapping uids new uids.
 

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qmail-users(5)                                                  File Formats Manual                                                 qmail-users(5)

NAME
qmail-users - assign mail addresses to users OVERVIEW
The file /var/lib/qmail/users/assign assigns addresses to users. For example, =joe.shmoe:joe:503:78:/home/joe::: says that mail for joe.shmoe should be delivered to user joe, with uid 503 and gid 78, as specified by /home/joe/.qmail. Assignments fed to qmail-newu will be used by qmail-lspawn to control qmail-local's deliveries. See qmail-newu(8). A change to /var/lib/qmail/users/assign will have no effect until qmail-newu is run. STRUCTURE
/var/lib/qmail/users/assign is a series of assignments, one per line. It ends with a line containing a single dot. Lines must not contain NUL. SIMPLE ASSIGNMENTS
A simple assignment is a line of the form =local:user:uid:gid:homedir:dash:ext: Here local is an address; user, uid, and gid are the account name, uid, and gid of the user in charge of local; and messages to local will be controlled by homedir/.qmaildashext. If there are several assignments for the same local address, qmail-lspawn will use the first one. local is interpreted without regard to case. WILDCARD ASSIGNMENTS
A wildcard assignment is a line of the form +loc:user:uid:gid:homedir:dash:pre: This assignment applies to any address beginning with loc, including loc itself. It means the same as =locext:user:uid:gid:homedir:dash:preext: for every string ext. A more specific wildcard assignment overrides a less specific assignment, and a simple assignment overrides any wildcard assignment. For example: +:alias:7790:2108:/var/lib/qmail/alias:-:: +joe-:joe:507:100:/home/joe:-:: =joe:joe:507:100:/home/joe::: The address joe is handled by the third line; the address joe-direct is handled by the second line; the address bill is handled by the first line. SEE ALSO
qmail-pw2u(8), qmail-newu(8), qmail-lspawn(8) qmail-users(5)
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