Dear all,

1.)Do you know what command should I issue such that I can know what current run level I am in?
2.)Do you know where to set the domain name?(now it is root@localhost.localdomain , I want to change it to , say, root@abc.com)

Thank you very much!

Surpisingly enough, the command is "runlevel". It will return two values, the first being the previous runlevel; the second being the current runlevel. If you haven't changed runlevels since you booted into the default runlevel, the first ("previous") value will be "N" for "None". The default runlevel is that specified in theline of /etc/inittab, where "n" is a number specifying the runlevel. If, after booting, you haven't changed runlevels by issuing the "init <runlevel_number>" command, your runlevel will always be the default specified in /ect/inittab.
The "hostname" command can be used to check and/or change both the host and domain names. If you just issue the "hostname" command, that will return your current host+domain name. Given your example, the output from the hostname command should be "localhost.localdomain" (the "root@" is not part of your host/domain name, you just get that as a function of how your command prompt is set up). If you want to change that , issue the hostname command followed by your new name (again using your example):. You might have to restart for this to take effect.

Also- be aware that there is a "domainname" command, but it applies only to an NIS domain name, and isn't necessarily the same as the hostname/domain that you're asking about.

I've tried hostname abc.com,however,

1)I've to set it again each time I reboot
2)As told by you it just set the domain name.How can I set the host name then?(e.g , I want to set the hostname to hpchong7).

Thank you very much!

Sorry- it seems that setting the hostname with the hostname command isn't persistent.

The hostname is stored in two files, /etc/hosts and /etc/sysconfig/network. If you change your hostname, make sure you change it in both files. You can also set your hostname using the graphical configuration tools linuxconf and netconf. In either one, click on the "Basic Host Information" heading.

Dear sir,

May you teach me how to change as I get my IP from DHCP.It's not good to hard code the IP in /etc/hosts.Thank you!

Sorry, but no, I can't. I assumed by the nature of your troll that you were using static, not dynamic.

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Dear Sir,

Then how should I do right now?thanks!