HI! Vyacheslav, thanks for your investigations. Yes, I had a group with more than 80 members. useradd does not hang when truncating this group. I can't understand why useradd reads this group even when not using it in useradd command-line nor /etc/default/useradd. useradd seems to be quite buggy... Ciao, Michael. Vyacheslav S.Kulchitskee wrote:

Yesterday i'm found the same problem - useradd stop working.

This is small workaround, which help me to solve problem:

1. delete string with "GROUPS=" from /etc/default/useradd (i'm found, that all new accounts belong to additional groups "uucp, dialout, audio, video", but i don't need this) After that all created users well be belong to default group "users"

2. create new "fake" group - /usr/sbin/groupadd fake

3. move existing users from additional groups "uucp, dialout, audio, video" to new group - /usr/sbin/usermod -G fake $username (i wrote small perl-script, which make this operation)

4. remove "fake" group - /usr/sbin/groupdel fake

5. play with /usr/sbin/useradd many-many times! :)

PS. Sorry for my english...