How do I rename a user name from ‘tom’ to ‘jerry’ under Ubuntu Linux?
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usermod command
How do I restrict access to a given command for instance /opt/apps/start, to authorized users only under Linux / UNIX / BSD operating system?
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I‘m CentOS Linux version 5.x user and I’d like to restrict execution of /usr/sbin/userhelper to console users only in xusers group?
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Q. How can I force my Linux users to change their passwords upon the first login under CentOS / Debian Linux?
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How do I add a user to a group under Sun Solaris UNIX operating system from a shell prompt or command line?
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Q. User tom is a member of a group called sales and printer. I’d like to remove tom from a group called printer without editing any user configuration text files stored at /etc/ directory?
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Q. How do I deny or block user login for user id tom? I’m using CentOS 5 Linux server OS. A.. You need to use passwd command. Deny user login by locking out account Pass -l option to passwd command. It is used to lock the specified account and it is available to root only. [...]
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