For some reason that is a complete mystery to me, RHEL does not give you the link status when you run # ifconfig -a. This makes it incredibly hard to debug link integrity issues! Buried amongst all of Red Hat’s proprietary commands, however, is a utility called ethtool, which does give you the status of [...]
When many new servers are delivered from the factory, the system clock is way off. Most UNIX systems run “ntpd” to keep the time in sync with internet time servers, which are, in turn synchronized against an atomic clock. This results in a system time that is very very close to the “actual” time of [...]
OpenGroupWare is an open source groupware package intended as an alternative to proprietary applications such as Exchange and PostPath. It is fairly robust in its feature set, and even integrates well with MS Outlook.
Its strongest points, in my opinion are that it does not depend in any way on Active Directory, and that it [...]
When you install RHEL, the filesystems are labeled for you. Usually you won't have to mess with it anymore, but on occasion, you may want to change them to more accurately represent the data that is stored on that partition. If, for instance, you used to have all of your database files on a partition [...]
Many system 5 UNIX variants use scripts in the /etc/rcN.d/ directories to control which services should be started in the various runlevels. If, for instance, you wanted the secure shell daemon to run in runlevel 4, you would put a script named something like "S55sshd" in "/etc/rc4.d". This script would usually accept the "start" "stop" [...]
Whenever you're using NFS mount points, it's really nice to use some type of automounter. Linux and FreeBSD use AMD to accomplish this, but Solaris uses automountd, and it's fun and easy to use... Here is an example of a configuration that will automatically mount an NFS share and unmount it after 5 minuets of [...]
Sometimes it's useful to create a virtual network interface on your Solaris box, so that you can associate multiple IP addresses with the same host and not have to go through all the trouble of buying another NIC.
Here's a quick HOWTO. Let's assume our network card is eri0, and we want to create a virtual [...]
After getting PHP 5.0.5 to compile on my Solaris 9 server, I got the following error when doing the make install:
ld.so.1: php: fatal: relocation error: file /u01/packages/src/php-5.0.5/sapi/cli/php: symbol xmlRelaxNGCleanupTypes: referenced symbol not found
Killed
make[1]: *** [install-pear-installer] Error 137
make: *** [install-pear] Error 2
Turns out that the Sun XML packages are stomping all over the xml2 package from [...]
Earlier this month, a company came along and asked for a RAID 10 array. Understanding that RAID 10 is a cooler sounding way of saying RAID 1+0, I understood it as a mirror set that is striped across another mirror set. Simple enough... Just concatenate a couple of mirrors, and you've got RAID 10.
Indeed, RAID [...]
We all know that Sun is MUCH cooler than Dell, but the company is finally coming out and saying it in no uncertain terms. Apparently They have tried to get these advertisements into several major industry publications, but have been censored at every attempt because someone may find the material offensive.
Yeah... Sure... Much more likely, [...]
