[CentOS] Re: Planning Mail Server (with low resources)

Ed Morrison wrote:
> <snip>
> 
> If possible, get / to the state where it is mounted read only.
> </snip>
> 
> Feizhou,
> 
> If you wouldn't mind, could you expand on this a little...i.e. how would 
> you set this up?  Consequences for doing so?

It really is getting /usr, /var and /tmp out of the way (them tmp 
directories) and then getting to a state where system wide configuration 
(/etc) is infrequent. The consequences will be the need to remount / to 
be writable for any system changes like adding a user or changing a 
config and then remounting read-only again.

Moving non boot services and their configs off / would help in this regard.