When you install a Perfect Server based on Centos and ISPConfig v3.x, the system / 'installer' creates for the components self-signed certificates. All these certificates will generate different warnings in your browser, mail clients etc. So time to eliminate those warnings.
First I needed to find out where all those certificates are located, and what there formats are. In my case, there are three services that use SSL/TLS in some form;
- Postfix SMTP service
- Courier IMAP service
- http / Apache2 webservice
Checking the configuration files will reveal their locations.
Just a small post with the instructions on upgrading Splunk on Ubuntu Linux.
First download the Splunk update. The Splunk website also gives you the wget command, which you can use directly on the Linux commandline.
Syslog-ng is a replacement for the default syslog daemons you get with most Linux distributions. The advantage of syslog-ng is that the configuration is easier to understand, and it gives the sys-admin numerous advantages. Especially in complex environments.
Let's say we have a RADIUS environment which is able to send authentication and accounting information through syslog to external devices. And let's assume that a relevant part of this syslog information is needed by a department within a large cooperation.
Installing syslog-ng (on Ubuntu) is done by the following command:
# sudo apt-get install syslog-ng
Through the use of syslog-ng we can store, and/or forward syslog information based on the following (but not limited to):
- source IP address
- destination IP address
- syslog level
- content in the original syslog message by using regular expressions.
All this can be configured in the /etc/syslog-ng/syslog-ng.conf file.
The moment you download OS X Lion, you'd better have a copy of OS X Snow Leopard, because by default the new Apple OS can only be installed on a previous installed Operating System (upgrade). So if you need to reinstall your Mac in the future, you need to install OS X Snow Leopard first, and then upgrade to OS X Lion. Also, there's no way of ordering an OS X Lion copy on DVD..... Well, that sucks.
Fortunately, there's a way of creating the installation DVD by extracting the actual disk image from the downloaded OS X Lion installation package.
The Leica M9 has no means of determining foreign or old lenses. The newer Leica lenses have a 6-bit (visual) coding mechanism for determining the lens. Problem is that this is only for (relatively new) Leica lenses. There is the possibility to manually select the lens in the menu of the M9, but that's only limited to the Leica brand lenses. No option for Carl Zeiss lenses.
For certain characteristics, and in-camera processing of the RAW image it's handy to manually select a Leica lens even though you've attached a Zeiss lens. This can be automated by coding the lenses yourself (or have Zeiss do it for €100 a lens).
All this is nice, but it still generates photos with faulty EXIF information, because you shot the photo with a CZ C-Sonnar 1.5/50mm and not with a Leica 1.4/50mm Summilux ASPH....
My Mac Mini with OSX Server had this thing that the hostname (as displayed in the Terminal app) would change after a reboot. Something that annoyed me tremendously. Thankfully there are several (Terminal) commands to change the hostname (back) to its 'original name'.
Since I wanted to change my hostname PERMANENTLY, I used the following command:
sudo scutil –set HostName new_hostname
This worked perfectly. Or so I thought.
