hi.....
i have created users in solaris, now i am unable to delete those users i have used command "userdel username" but it shows cannot delete user,, it is in use,, cant understand where these users are in use.... and plz tell me how to stop users....

User has some processes running under their name. Do a ps auxww | grep username and kill those processes.

---------- Post added 07-10-12 at 09:44 AM ----------

Could also be open files, also do an lsof | grep username

All the user login info is in /etc/passwd and /etc/shadow/. If these are the users you created then you can delete the users from there (Be sure that you have a backup of these files just in case ...). After that you can simply go to /home and remove the home folders.
Since the advice contains some steps that can be problematic make sure that you know what you are doing.
According to the man page of userdel (Linux ofcourse) it is possible to delete users even if the user is logged in. You simoly have to execute 'userdel -f username'
Hope this helps some.

The -f will work but it will miss part of its removal. This is usually caused by a running process under the user or having an open file in the home directory of the user. The best practice would be to identify this and either kill the process or remove the file lock, then remove the user via the proper method.

The -f option removes home directory so make sure that is what you want. Check for user processes and kill any that belong to the user.

Solaris and Linux handle things differently with users, for example if I log in and then want to change my username via the usermod command in Solaris after su'ing to root I will get an error and in Linux it will change it while I'm logged in.