On 11/04/2014 02:49 PM, José María Terry Jiménez wrote: > El 04/11/14 a las 20:36, Frank Cox escribió: >> I would like to set up a cron job to automatically check whether my mailserver and webserver are up, and tell me if they're not. >> >> This script tells me if my webserver is up: >> >> #!/bin/bash >> wget -q --tries=10 --timeout=20 --spider http://melvilletheatre.com >> if [[ $? -eq 0 ]]; then >> echo "Online" >> else >> echo "Offline" >> fi >> >> How can I do the something similar with my mailserver? >> >> Or if someone knows of an integrated tool that will monitor this in a better way (whatever that may be), I'm more than interested. >> > Hello > > I use Nmap to test if a server up in a port: > > $ nmap -p587 a.mail.server |grep -i 587 > > 587/tcp open submission > > Or several ports: > > $ nmap -p25,143,587 a.mail.server |grep -i open > 25/tcp open smtp > 143/tcp open imap > 587/tcp open submission > > If the server is working, the port is shown as open. You can parse it as > desired to message you as you want > > Best > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > How about using nc with something like this: No server listening at 10.0.129.71 $ nc 10.0.129.71 25 << EOF QUIT EOF $ echo $? 1 Server listening at localhost $ nc localhost 25 << EOF QUIT EOF 220 sclark66.netwolves.com ESMTP Sendmail 8.14.4/8.14.4; Tue, 4 Nov 2014 15:03:22 -0500 221 2.0.0 sclark66.netwolves.com closing connection $ echo $? 0 -- Stephen Clark *NetWolves Managed Services, LLC.* Director of Technology Phone: 813-579-3200 Fax: 813-882-0209 Email: steve.clark at netwolves.com http://www.netwolves.com