Archive for the ‘Computers’ Category

MacOS X Administrators from LDAP

I’ve been building an LDAP single sign-on system (for Linux, Mac and PC via Samba PDC) at $dayjob and I hit a wall with my MacOS X clients: it seemed that admins had to be specified locally. However, I finally found this solution which boils down to running this as root (or sudo) on each […]

Postfix and “noatime” Mounts

Never – ever – mount a filesystem Postfix uses with the noatime option. If you have fast_flush_domains enabled (which is is, by default) and you have a lot of deferred mail for which you’re the relay host, it will cause mail delays because the flush service uses atime to decide when it should refresh the […]

SFTP Clients

What I end up using for SFTP clients: Mac: Transmit ($29.95) Windows: WinSCP (free, open source)

Debian on a Dell PowerEdge 750

If you have tried to install Debian on a Dell PowerEdge 750 using the 2.6 kernel (or just using a 2.6 kernel after install), you may have noticed that it can’t find your CD drive. In order to fix this, you’ll need to make sure the following modules are loaded: piix ide-disk ide-generic You’ll need […]

Serial Console Goodness

If you’re tired of messing around with KVM switches, monitors and keyboards, or need remote console access to your server, a serial console may be just what you need! It’s far easier than you think, and it’s convienent, especialy if you have a laptop or a really long serial cable to your desktop. Please note […]

802.11 b/g Channels

Here’s a handy chart that shows the 802.11b/g channel assignments. I’ve had this on another website for a long time, but the source page disappeared. Luckily I saved a copy so it can have a new home here. The key to wireless performance is to use non-overlapping channels. Channels 1, 6, and 11 are the […]

Solaris Cross Compiler

I have a Sun SPARCStation that runs Solaris. I need to install shftware on it, which includes some stuff that needs to be compiled with specific options or features. However, the sparc doesn’t have enough drive space in /, /usr, or /opt to install a compiler and all its related goodness. What is one to […]

Power Outage

A early morning (as in 2:30am Pacific Time) power outage, coupled with the inaction of my pager, resulted in a multiple hour outage of the Roller Network. I sincerely apologize for the service outage. I intend to obtain a larger capacity UPS shortly that will prevent power failures from being a problem.