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Originally Posted by
kanata
1.On x86 Machines ( Pentium4 ), What is the maximum number of Services( sshd, ntpd,named ,samba, etc.) that can be installed?
There are no arbitrary limits. It comes down to the amount of memory your server has, and how much traffic your machine and network will be required to handle. If this is not high, then even a small server is capable of quite a lot.
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Is there a rule of thumb to attain the best possible performence?
Short answer: No. Long answer: nnnnnnnno. This is a complex problem that depends on what
kind of performance we're talking about. network performance? disk performance? response times? memory throughput? other?
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2. Is there a systematic way to boot a remote Machine?
You mean, wake-on-LAN? That's simple enough if you're on the same local area network, but if you're not, you'll have to get something else on the same LAN to do it for you.
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3. Are there any problems of having two dhcp servers on the same network?
Yes, they will interfere with each other, give inconsistent answers, possibly cause duplicate IPs, etc. Turn one off, you only need one per NAT segment.
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5. Can Linux Commands such as ( mkdir, ls, cat ) changed so that they behave different?
Different in what way?
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6. How can you deny a user to use Linux Commands such as (mkdir, rm etc) without denying shell access?
Don't give them write access for any files or directories you don't want them to touch.
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7.How can I monitor what files users have erased?
You could check their shell history. What/where this is depends on the shell.
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8. How are the systems (mail, uucp, mysql, news etc.)accounts different from user accounts? ( what are the significance of system accounts, when or how do you use them?)
System accounts are used by daemons. When they're running, you'll find they're running under these users. They're there to give them access to the files they need and absolutely nothing else, and to keep everyone else out. The 'nobody' user in particular grants access to nothing at all. You don't need to log into them yourself.
