The FreeBSD Diary |
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notes on rebooting and IP numbers
28 July 1998
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NOTE: It's amazing how I can look back at articles such as this and realize just how much newbies
don't know. This is a very good example. At some time, you didn't know the following information
either. After some experience, we just take it for granted.
This is a vital point to remember when you are helping others. Don't assume much. |
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28 July 1998
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| The person that helped me out with the name resolution problem also took the time to explain a few points about rebooting. These comments were based upon my previous "dns" problems. I've included them here because they make for good novice-reading. |
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rebooting
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| There isn't much need to reboot a Unix box. Most daemons provide some mechanism
for restarting themselves. For example "kill -hup <process id>". In theory, you should never have to reboot unless you've had a power failure or have installed a new kernel or a major upgrade of the whole system. Some daemens come with a helper tool. For example, named, comes with ndc which will send these SIGHUP signals for you. |
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IP numbers
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| IP numbers are assigned to network interfaces, not computers. If a computer has
two network cards, each network card will have a different address. The same
computer can be known by more than one IP and be connected to more than one sub-net. This is a mistake I made. And it's been pointed out to me at least three times. |