If you’re an OnApp user you probably know you can make a VNC connection to your VM’s using the Control Panel. This uses a java applet in your browser as the VNC client.
Wouldn’t it be nice to use your own VNC client (like Remotix) instead?
In fact, you can, but OnApp spawns a VNC server on a (somewhat) random port and a new random VNC password for each sessions which you’ll have to figure out before setting up your connection.
I experienced a seemingly weird issue with a freshly installed CentOS server today.
SSH Public key authentication was correctly set up; The
sshd_config was properly configured and a
~/.ssh/authorized_keys was present with the correct rights and
verified correct contents (as the file was yanked from another, working,
server with scp).
All attempts to connect to the machine using key authentication silently failed however.
Letting Ubuntu pick the apt-get mirror closest to you is pretty easy.
I suffered from a Munin version 2.0.10 installation that refused to update the majority of the graphs. Only the first two of a long list were being updated, the rest all ‘hung’ at the same moment.
After a little investigating, the problem surfaced:
$ su - munin --shell=/bin/bash munin-cron
File is not a perl storable at blib/lib/Storable.pm (autosplit into blib/lib/auto/Storable/fd_retrieve.al) line 398, at /usr/lib64/perl5/vendor_perl/5.12.4/Munin/Master/Utils.pm line 362
File is not a perl storable at blib/lib/Storable.pm (autosplit into blib/lib/auto/Storable/fd_retrieve.al) line 398, at /usr/lib64/perl5/vendor_perl/5.12.4/Munin/Master/Utils.pm line 362I started out by fixing all items the munin-check script suggested,
which is always a good starting point.
So, you have a TYPO3 website and despite all your best efforts, it’s still too slow in your opinion.
Maybe it’s time to start using Varnish as a caching reverse proxy to help speed things along. It’s fairly easy to set up, but there are some caveats when it comes to TYPO3. I’ll try to outline a fairly basic scenario below that should fit a number of TYPO3 installations.
Keeping your Gentoo Linux server up to date isn’t as straightforward as
let’s say an Ubuntu box, where you would just run
$ apt-get update && apt-get upgrade && apt-get clean for example.
Gentoo is far too flexible for a one size fits all approach. The commands outlined below come pretty close for daily use though:
Well. Here we are!
New year, new approach to blogging.
In the past year I haven’t managed to push out a lot of blog articles though I’ve been working with loads of new, interesting technologies and approaches.
Being a programmer, I blame the software I use to blog. In my case that’s the TYPO3 installation at rem.co. It’s recently been updated to TYPO3 6.0, and I haven’t gotten around to fixing all the bugs that appeared after such a major upgrade.
Moreover, that site uses the ancient tt_news plugin as a blog substitute, which makes blogging a bit… troublesome to put it mildly. Especially “_advanced_” stuff like including code snippets and multiple layouts in one article.
While examining my webserver statistics, I noticed that quite a lot 404’s are being served on most of my domains to scan bots that are trying to find exploits in possible running PHPMyAdmin configurations. Though harmless if you keep a clean ship with a decently configured PHPMyAdmin and the latest updates like I do, I still decided I couldn’t let this behaviour unanswered. So I took action, and wrote a small fail2ban filter that permanently drops all traffic from the IP addresses these scans originate from, like I do with every address that misbehaves in any way.
The regex used won’t capture all attempts, but with my configuration
only 1 hit is enough to get you banned (the scripts these scans call are
main.php and config.inc.php, which aren’t to be called directly,
especially not when they fail with a 404 like these), and all scanning
attempts I’ve seen so far cycle through at least 20 different
combinations.
It is possible to monitor fan speeds and temperatures on Dell Poweredge servers under Linux. You can achieve this by reading out the IPMI data that is available on the system.
I used the steps on this website to buffer the data gathered by IPMI to use in Cacti.
However, in addition to Cacti I also use Munin to monitor various system parameters. Wouldn’t it be nice to incorporate graphs for fan speeds and temperatures in Munin? I thought so, so I developed a way to do this.
This article is only available in Dutch.
Sinds een recente verhuizing beschik ik thuis over een Ziggo Alles-in-1 Plus pakket, met internet, tv, én telefonie.
Daarvoor maakte ik gebruik van een Cisco VoIP netwerk op basis van een externe SIP provider. Natuurlijk wilde ik mijn Cisco netwerk blijven gebruiken, maar dan wel op basis van de Ziggo telefonie aansluiting.
Helaas maakt Ziggo gebruik van het PacketCable protocol over EuroDocsis, in plaats van SIP. Daarnaast heeft het Motorola SurfBoard modem dat bij het Ziggo abonnement geleverd wordt geen SIP interface voor het LAN, maar beschikt over 2 POTS poorten op RJ11 connectoren.