If you have ever tried to use a new Fedora or RHEL to build packages for older systems you may have run into errors at installation time. For example, if you were to roll a package on Fedora >=10 or RHEL >=6 and tried to install it on RHEL 5 you will get rpmlib(FileDigests) errors. …
Category Archive: Computers
Feb
08
2010
When Less is More
Hmmm… you would think the empty set resulting from the intersection of the product title and product features would have been a clue that something was awry.
Dec
20
2009
On topics such as how to run sudo from a cron job
If you want to run sudo from any part of a cron job make sure you comment out the Defaults requiretty from /etc/sudoers. Bit me twice now so hopefully I’ll remember next time. Ed: Apologies to those who have read this before but I had to restore from backup and my last post wasn’t in …
Aug
16
2009
Entourage Apple Script for Moving IMAP Mail
In my last post I described a VB Script for moving IMAP email from my inbox to an archive folder. As an interesting Apples to Oranges (or Apple to Microsoft?) comparison here is the Apple Script I use with Entourage to perform the same task. I will post two versions: one that performs the exact …
Aug
14
2009
Outlook VB macro for moving mail
Been meaning to post this quickie for awhile. Took me a good bit of searching and tweaking but I’ve been using this macro for about two months to move email in my IMAP account in Outlook (2007) to my archive folder. Then I bound it to a hotkey combo by adding it to my menu …
Mar
02
2009
Solid State Devices (SSD) and journaling
A few things all of us are probably interested in: SSD Write Amplification: http://www.extremetech.com/article2/0,2845,2329594,00.asp Journaling and write performance in ext4: http://thunk.org/tytso/blog/2009/03/01/ssds-journaling-and-noatimerelatime/ The bottom-line as far as wear and tear: vfat is basically the same as a journaled FS from a wear-leveling standpoint, both are worst case. Thankfully vfat, being the worst case, forced the manufacturers …
Nov
06
2008
Disabling file access time updates using noatime in OS X
The past few days people in Linux blogosphere have been bringing back up the noatime/nodiratime mount options. These options disable the updating of file and directory access times. On many standard systems when you read file a “last read,” or access time, timestamp is written to disk. Disabling the writing of access times can provide …
Oct
21
2008
My favorite shell completion of all time…
My favorite BASH shell completion of all time is hostname completion for all of my favorite commands: SSH_COMPLETE=( $(cat ~/.ssh/known_hosts | \ cut -f 1 -d ‘ ‘ | \ sed -e s/,.*//g | \ uniq | \ egrep -v [0123456789]) ) complete -o default -W “${SSH_COMPLETE[*]}” ssh scp sftp rsync nmap traceroute ping nslookup …
Oct
02
2008
Red Hat RHN SSL certificate verification error
I was trying to connect to RHN from Yum/up2date in Red Hat Enterprise Linux 5. I kept getting fatal invalid SSL cert errors. The strange part – out of all of the machines I tested it was only occuring on a single RHEL 5 laptop. The really strange part – it was happening on the …
Oct
02
2008
Deleting All Messages in Exchange OWA
Ran into a problem with Exchange. I created a server-side rule to place spam messages in a folder that didn’t exist. All spam was instead going to the root folder, the folder above my inbox. Well if you use Entourage to access Exchange you will not be able to access this folder. If you go …
