The ramblings of a computer geek
Email is a tricky thing to do right, though a couple of simple tools can help you test your mail server before you start to use it, i.e. make sure mail can be delivered correctly to a users mailbox. Also it can help diagnosing certain problems that you might have with your email. POP – […]
More...On our Cisco 4500 series switches we could not see when ports where going up or down, even when using “terminal monitor.” We use this technique to identify ports and has been useful in our VLAN project. The problem was that on 4500 series switches, you need to manually enable this type of logging, to […]
More...Setting up a second exchange server in the same routing group, all installed fine, however, after moving a mailbox to the new server and then sending an email to the mailbox, the mail got stuck in the queue on the first server. Checked the common things like DNS, firewall ports etc. all looked fine. But […]
More...You can find a duplicate email address, by using Active Directory Users and Computers, then following this procedure: To search for a duplicate address do the following: Open Active Directory Users and Computers. Right click on your domain name and click on the “find” option. Then choose “custom search”. Then click on the “Advanced” tab. […]
More...I came into work this morning to a downed Exchange storage group and mail store. In the event log just after the backup ran i saw these string of events in the event log on the Exchange server. <em>Event Type: Error Event Source: ESE Event Category: General Event ID: 482 Date: 27/10/2010 Time: 21:00:34 User: […]
More...I’m still trying to get VMWare 3.5 installed completely and servers virtualised. But utlimately it would be nice to use vSphere4 in the end. Heres a good PDF showing the new features and how the licencing works (which has been made a bit more complicated! http://www.boche.net/blog/wp-content/uploads/2009/VsphereData.pdf
More...Find and replace with VI on a pathname is a bit tricky you ned to use escape characters. In this case /bin/mail should be replaced with /usr/bin/mail The command below would do it:
More...With Nagios using check_icmp is the way to go, it better and faster, below is an example configuration directive for setting the check-host-alive command which will be used by each host check.
More...Here is an example of find and replace with VI, this will replace every instance of the “findthistext” string in the file with “replacewithtext”. Neat saves lots of typing!
More...This is what would be needed in your hosts configuration to monitor using check_icmp rather than check_ping. This makes the assumption its going to do two pings, otherwise turn “-p 2” into $ARG3$ instead!
More...