Category Archives for Linux
Create a Linux Boot ISO image to start via Kickstart
Getting tired of creating new VM’s, and don’t want to clone for a particular reason but want them standardized? Easy. By creating a boot image that immediately starts a kickstart installation, you can completely automate creating a VM regardless of … Continue reading
Update Postgres in Ubuntu
The Postgres website download page doesn’t do a great job of documenting how to keep PG up to the latest release. Even for those of us who are using 10.10, the standard repositories still point to older 8.X versions. To … Continue reading
Fix zimbra logrotate issues
If this error occurs on a host with Zimbra installed: /etc/cron.daily/logrotate: error: zimbra:64 unexpected text It’s due to a typographical error in /etc/logrotate.d/zimbra that has not been fixed in the latest release (6.0.3.) The log rotate configuration file for Zimbra … Continue reading
Fix Logwatch emails on Zimbra hosts
We’ve had an issue for a while where Logwatch emails are not getting through properly in Zimbra with Zimbra complaining about relay issues. While our migration to Zimbra will be the subject of another, much longer post, our last remaining … Continue reading
Lack of .Xauthority
Have you ever had an issue with running X clients on a firewall protected host where you can’t login directly as the user? I happens more often than you might think. Here’s an example: You are user “A” on “hostA”, … Continue reading
Setting up stronger password policy rules in Linux – Part II
In a previous post we discussed how to setup stronger password policy rules in Linux and found out that any changes we make are not reflected back to existing accounts. So how do we make these changes retroactively apply to … Continue reading
Setting up stronger password policy rules in Linux
Increased password security is no longer an optional item in setting up a secure system. Many external organizations (such as PCI) are now mandating security policies that can have a direct effect on your systems. By default, the account and … Continue reading
Setup SAN disk for use in a Linux Veritas cluster
For this particular exercise we’re going to go through the entire process of provisioning disk for use in a VCS cluster. We will use EMC Symmetrix disk zoned and masked to a RHEL 4u6 host as the foundation.
Find WWN’s on Linux
To find port and node WWN’s while the system is running: 2.4.x Kernels > cat /proc/scsi/[hba_type]/(n) where hba_type is the driver (e.g. lpfc for Emulex) and (n) is the HBA number. 2.6.x Kernels: > cat /sys/class/scsi_host/host(n)/[port_name|node_name] Hosts with multiple HBAs … Continue reading