07-07-2010
Mail/ftp/web servers, on VIRTUAL!! dedicated server. Also resource usage. Centos 5.
Hi. First of all, would 4 or 5 websites, 1 ftp server (when downloading by someone or a few persons or one, concretize) and one mail server (not many emails, just to sound official and have a nice, spam-free email for myself). Websites with not that many, but some, later more visitors, quite high amount of images in some posts (a blog) eat much resources? Like CPU is ~1.8Ghz, maybe 1.6, Xeon, Rams are 1GB total. I'm not asking if it can run it, because i am using itfor other servers, i'm asking how much resources it would eat for each server?
Second of all, i could find guides for normal servers, dedicated ones, what about virtual dedicated servers? Please be sure what is a VDS though. So are there any tutorials for that? You cannot control a few things of this thing.
Also, can i use a few domains for those different websites and for the main computer, which wouldn't interract together? For example, you couldn't connect to the computer usign the domains, but you could connect trough the address given by your server provider, to be exat to a game server?
If you need a better explanation, please ask. Thank you for any answers to these questions.
Using Centos 5 and i would like to use the best software for those things available. I'm not very advanced linux user though, but i want the best software available anyway.
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System Administration Commands etrn(8)
NAME
etrn - start mail queue run
SYNOPSIS
etrn [-v] server-host [client-hosts]
DESCRIPTION
SMTP's ETRN command allows an SMTP client and server to
interact, giving the server an opportunity to start the pro
cessing of its queues for messages to go to a given host.
This is meant to be used in start-up conditions, as well as
for mail nodes that have transient connections to their ser
vice providers.
The etrn utility initiates an SMTP session with the host
server-host and sends one or more ETRN commands as follows:
If no client-hosts are specified, etrn looks up every host
name for which sendmail(1M) accepts email and, for each
name, sends an ETRN command with that name as the argument.
If any client-hosts are specified, etrn uses each of these
as arguments for successive ETRN commands.
OPTIONS
The following option is supported:
-v The normal mode of operation for etrn is to do all of
its work silently. The -v option makes it verbose,
which causes etrn to display its conversations with
the remote SMTP server.
ENVIRONMENT
No environment variables are used.
FILES
/etc/mail/sendmail.cf sendmail configuration file
SEE ALSO
sendmail(1M), RFC 1985.
CAVEATS
Not all SMTP servers support ETRN.
CREDITS
Leveraged from David Muir Sharnoff's expn.pl script. Chris
tian von Roques added support for args and fixed a couple of
bugs.
AVAILABILITY
The latest version of etrn is available in the contrib
directory of the sendmail distribution through anonymous ftp
at ftp://ftp.sendmail.org/ucb/src/sendmail/.
AUTHOR
John T. Beck <john@beck.org>