linux & freebsd

Bind 9.9 CentOS 7 binary slave DNS zone files

January 12, 2015Eric Thern No Comments

https://kb.isc.org/article/AA-00608/0/Converting-Zone-Files-Between-Text-and-Raw-Formats.html With the development of the BIND 9.9 branch, zone file storage for slaved zones has been changed to expect the raw zone format by default. BIND administrators testing 9.9 or preparing for migration from an earlier version have asked how to deal with this format change. Several options are available. Rename and Retransfer: … Continue reading Bind 9.9 CentOS 7 binary slave DNS zone files

Quick Plesk command line hints

July 14, 2014Eric Thern No Comments

Enable spamassassin on all accounts on server mysql –uadmin –p`cat /etc/psa/.psa.shadow` psa –Ns –e “SELECT CONCAT_WS(‘@’,mail.mail_name,domains.name)FROM domains,mail,accounts WHERE domains.id=mail.dom_id AND accounts.id=mail.account_id” | xargs –I {} ./spamassassin –u {} –status true –hits 7 –action move Setup a new customer via command line /usr/local/psa/bin/./customer —create username –name ‘name’ –passwd ‘password’ –country US –phone 123456 –email hosting@domain.com Setup … Continue reading Quick Plesk command line hints

GPS data conversion

August 5, 2011Eric Thern No Comments

Handy gpsbabel conversions: Google KML to GPX: To translate waypoints into tracks, in order to use in GPS Photo Correlate (gpscorrelate): gpsbabel -w -s -N -i kml -f “google-waypoints.kml” -x transform,trk=wpt -o gpx -F “waypoints.gpx” If a number of waypoint files (NMEA, GPX, etc.) were originally concatenated, the resulting .kml may not be in chronological … Continue reading GPS data conversion

Linux (desktop or server) with md RAID-10

January 2, 2011Eric Thern No Comments

Current setup on Ubuntu 9.10, installed via the alternate CD on x86_64. Contrary to most posts online that say you can only boot from a partition on RAID1, not RAID10, after setting up both partitions on RAID10, I was able to boot just fine. There may be a difference between RAID10 in an n=2 (2 … Continue reading Linux (desktop or server) with md RAID-10

Minimizing downtime associated with Web/DNS/Mail IP address migrations

April 3, 2010Eric Thern No Comments

Migrating servers to new datacenters or IP addresses is never entirely problem free, usually due to many DNS servers on the internet not obeying TTL’s or caching old records for way too long. These old cached DNS records (usually at different ISP’s, major mailservers like google, hotmail, yahoo, etc.) cause problems where they’ll route mail … Continue reading Minimizing downtime associated with Web/DNS/Mail IP address migrations

VMWare 2.0.x and CentOS 5.4 glibc crashes and instabilities – a workaround solution

March 5, 2010Eric Thern 1 Comment

If you’re running VMWare Server 2.0.x on CentOS 5.4, you’ll have noticed that you (most likely) suffer random reboots and other instabilities on the guest operating systems – this is due to a glibc error in vmware’s libraries, and has yet to be fixed by vmware (thanks a lot). The real issue is CentOS/Redhat has … Continue reading VMWare 2.0.x and CentOS 5.4 glibc crashes and instabilities – a workaround solution

Yum update check script – runs via crontab and emails when new updates are available

February 19, 2010Eric Thern No Comments

Here’s a quick script that will check yum updates and email you when there are new updates available. Split into two sections, one script is for all package updates, and the other script is for letting us know if we need to reboot when a new kernel package has been installed. Script to check for … Continue reading Yum update check script – runs via crontab and emails when new updates are available

logrotate tweaks to enhance rsync backups

November 22, 2009Eric Thern No Comments

logrotate, by default (at least on CentOS as of 3, 4, and 5.x), rotates logs by incrementing all numbers on previous logs by one, and moving the current log to log.0 This is all fine and good if you like your logs to all be rotated in order, and have a certain number backed up: … Continue reading logrotate tweaks to enhance rsync backups

OpenVZ cache update script

November 17, 2009Eric Thern No Comments

Script to update OpenVZ vz cache for any template. Useful to upgrade to newest security releases. #!/bin/bash # # updates cache of VZ # # # # Set These (or pass from command line as below) # #TEMPLATE=centos-5-i386-afull VZID=5999 # # use this from command line: # # ./updatevzcache centos-5-i386-afull # TEMPLATE=$1 # VZID=$2 # … Continue reading OpenVZ cache update script

Plesk 9.x overuse policy (and how to avoid domains being suspended)

October 8, 2009Eric Thern 2 Comments

Parallels, in their infinite wisdom, introduced new “overuse” policies into their Plesk control panel as of version 9.0. A great idea when just starting out, but a nightmare when upgrading from a previous version, since it changes the default behavior when clients and domain owners reach their pre-assigned limits. Now, instead of just warning that … Continue reading Plesk 9.x overuse policy (and how to avoid domains being suspended)