Password root,default boot and timeout of linux

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Hi all visitors,
i'm the new of linux system.
My boss lets me to create 10 users for my company.i user command useradd to create new user.and the he wants to secure on root password,default boot and timeout in system.
it means that he doesn't want the 10 users that i have created can't change root password,can't change default boot and can't change timeout.
So how can i do not let 10 users change root password,default boot timeout?
Thanks

Posted 30-Oct-11 4:55am

soeun tony

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Richard MacCutchan · Answer 1 · 2011-10-30T05:31:00

Just make sure they do not have access to the root password in the first place and that their UIDs are in the 'user' range, i.e. greater than 99. You should also ensure that the root user is secured so cannot be logged in directly except from the system console. Use the Linux man pages for the various commands (useradd, su, login etc) to check specific details on your system. There is also a wealth of information on Linux that can be found via Google.