Thoughts, ramblings and rants of a husband, father, network engineer, sysadmin, coder, company owner, employer, closet geek, sci fi fan, political anorak, impatient grump...
I live in Dublin, Ireland with my wife and daughter. I founded and manage Open Solutions, a company specialising in internet infrastructure. I also help ensure the internet keeps working in Ireland with INEX.
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Top Posts & Pages
- Apple OS X as an NFS Server (with Linux Clients)
- Recovering an LVM Physical Volume
- Git Web Applications (aka GitHub Alternatives)
- Ubuntu 12.04 (Precise Pangolin) and PHP 5.4 (again)
- Enabling External Commands in Nagios / Ubuntu
- Benchmarking the Mikrotik Routerboards RB750 and RB750G
- Useful RANCID Debugging Tips
- Pastebin Alternatives
- Virtual Mail with Ubuntu, Postfix, Dovecot and ViMbAdmin
- A PHP SNMP Library for People Who HATE SNMP, MIBs and OIDs!
Category Archives: Linux
As part of pushing our new release of ViMbAdmin, I wrote up a mini how-to for setting up a virtual email system on Ubuntu where the components are: Postfix as the SMTP engine; Dovecot for IMAP. POP3, Sieve and LMTP; … Continue reading
When running Ubuntu via Parallels on my new Macbook Pro (yes, sigh, I have moved to the dark side), I’d like it to recognise the Apple keyboard (English – UK) I’m using. Here’s how: Run dpkg-reconfigure keyboard-configuration Select Apple Laptop … Continue reading
Over in INEX we run a route server cluster which alleviates the burden of setting up bilateral peering sessions for the more than 80% of the members that use them. The current hardware is now about six years old and … Continue reading
I get caught by the following quite often (too many Nagios installations!): Error: Could not stat() command file ‘/var/lib/nagios3/rw/nagios.cmd’! The external command file may be missing, Nagios may not be running, and/or Nagios may not be checking external commands. An … Continue reading
I get caught trying to remember this a lot and there’s a really useful tutorial on this at the Net-SNMP website: Using and loading MIBS. If you’re using Ubuntu, also consider checking the comments in /etc/snmp/snmp.conf which (in 13.04) contains: As … Continue reading
I came across Pushover recently which makes it easy to send real-time notifications to your Android and iOS devices. And easy it is. It also allows you to set up applications with logos so that you can have multiple Nagios installations shunting … Continue reading
MySQL Master-Master replication is a common practice and is implemented by having the auto-increment on primary keys increase by n where n is the number of master servers. For example (in my.conf): auto-increment-increment = 2 auto-increment-offset = 1 This article is not about … Continue reading