The Cost of Owning a CarThe Cost of Owning a Car
There has been a lot of talk recently about the cost of petrol, Colin Charles is one of the few people to consider the issue of wages in this discussion[...]
Tag: Best Posts
ECC RAM is more useful than RAIDECC RAM is more useful than RAID
A common myth in the computer industry seems to be that ECC (Error Correcting Code – a Hamming Code [0]) RAM is only a server feature. The difference between a[...]
SE Linux Support in GPGSE Linux Support in GPG
In May 2002 I had an idea for securing access to GNUPG [1]. What I did was to write SE Linux policy to only permit the gpg program to access[...]
The Date Command and Seconds Since 1970-01-01The Date Command and Seconds Since 1970-01-01
The man page for the date command says that the %s option will give “seconds since 1970-01-01 00:00:00 UTC“. I had expected that everything that date did would give output[...]
Moving a Mail ServerMoving a Mail Server
Nowadays it seems that most serious mail servers (IE mail servers suitable for running an ISP) use one file per message. In the old days (before about 1996) almost all[...]
CPU Capacity for VirtualisationCPU Capacity for Virtualisation
Today a client asked me to advise him on how to dramatically reduce the number of servers for his business. He needs to go from 18 active servers to 4.[...]
Installing a Red Hat based DomU on a Debian Dom0Installing a Red Hat based DomU on a Debian Dom0
The first step is to copy /images/xen/vmlinuz and /images/xen/initrd.img from the Fedora (or RHEL or CentOS) DVD somewhere convenient, I use /boot/OS/ (where OS is the name of the image)[...]
Security Flaws in Free SoftwareSecurity Flaws in Free Software
I just wrote about the system administration issues related to the recent Debian SSL/SSH security flaw [1]. The next thing we need to consider is how we can change things[...]
Debian SSH ProblemsDebian SSH Problems
It has recently been announced that Debian had a serious bug in the OpenSSL code [1], the most visible affect of this is compromising SSH keys – but it can[...]
Ideas to Copy from Red HatIdeas to Copy from Red Hat
I believe that the Red Hat process which has Fedora for home users (with a rapid release cycle and new versions of software but support for only about one year)[...]