Where is this executable sysidcfg file located in Solaris?

Try <I>whereis sysidcfg</I> and it will give you the path to sysidcfg.

I type whereis sysidcfg and I got this

sysidcfg:

what is that mean?..where is it?

That could probeply mean that either <I>whereis</I> cannot find it or the sysidcfg is not installed. You can also try <I> slocate sysidcfg </I>, slocate is builtin in linux but I don't know for solaris.

I got the following result on Solaris 7:

whereis sysidcfg

blank line...

I got the following result on Solaris 8:

whereis sysidcfg

sysidcfg:

slocate does not work on Solaris...

The file should be in /etc but could be anywhere. If you read the man page on sysidcfg that is what it states. If you don't have one anywhere on the system, then check out the info in the man page on sysidconfig, sys-unconfig, and sysidtool.