If you have a particular question, please use the form below to ask it. Once I receive your question, it will be added to the list below and answered as soon as I have the time to look into your problem.
http://www.unixtutorial.org/2008/12/how-to-create-user-accounts-in-unix/
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Your Unix questions – my answers
Is there an easy way to find what (currently removed) username had a given uid?
Answer: depending on your situation, there may be no way to confirm this at all, but if you're lucky then I can help: What to do when numeric uids are shown instead of usernames.
See also: user management commands in Unix, list groups a Unix user belongs to
How can I create user accounts in Unix?
Answer: use useradd command, I explained the basics in the How To Create Unix User Accounts post.
See also: user management commands in Unix
How can I compare two directories and only show files which are present in both?
Answer: pending
See also: Compare directories in Unix
What is the easiest way to synchronize directories between two systems?
Answer: You're going to like rsync! Truly, it's one of the easiest yet most flexible ways of synchronizing anything in Unix!
See also: Tracking Rsync progress, official rsync page.
How can we write a shell script in unix to find the day when date is given?
Answer: use the GNU date command: it's great for date/time manipulations! The answer to this particular question is here: Confirm a day of the week based on timestamp.
See also: Time and Date in Unix scripts
