The Cog

That Little Bit of Knowledge That Makes Everything Work

Entries for the ‘Ubuntu’ Category

Ubuntu 16.04 Runs Automatic Updates Whether You Say So or Not in the Installer

After selecting “No automatic updates” in the Ubuntu 16.04 server installer, I expected that the system would not attempt to upgrade anything without my permission, just like every version before. Turns out that is not the case. I found out the hard way when my production database shut down to upgrade in the middle of […]

Install zfs-auto-snapshot on Ubuntu 16.04 LTS/Debian

zfs-auto-snapshot not being available for 16.04 was not a situation I thought I would run into, yet here we are, disappointed by Canonical once again. In the meantime, I have ported the package from Trusty (14.04.5) to work on Xenial (16.04.1) and Debian Jessie. You can download the Ubuntu 16.04 package here, and install it by […]

A Tale of ZFS’ Success

ZFS is great. We hear it all the time, but you hope you will never need to utilize any of it’s advanced data-protecting features. I recently went through a series of events which makes me truly grateful for ZFS. This is a real world example that would have gone horribly different if I wasn’t using ZFS. It’s […]

Fix NFS Stalls on Linux with Fast Networking (Like InfiniBand)

Update 4/8/2017: This issue is actually caused by an underlying memory allocation deadlock bug in the ib_mthca kernel driver. The only true fix is to buy new hardware which does not use that driver and instead uses mlx4_ib. The following is left up for reference. For the last 6 months, I’ve had the most frustrating issue […]

Fix Volume Control Jitter in Ubuntu

A while ago when I switched from GNOME Shell to Unity, the first thing to bug me was the volume control in the top panel. When I would drag it side to side, it wouldn’t slide smoothly, instead it would jitter and jump back and forwards. This made it almost impossible to select the correct […]

Install Steam Games to SMB Share on Linux

I use an SSD and can’t install all my Steam games onto my SSD. I don’t have a large HDD in my workstation as all my files are on my huge ZFS file server. I simply wanted to install Steam games onto the share. Seems simple, right? I used to bind (using mount) the steamapps […]

The Greatest Music Player of All: Clementine

I’ve used my fair share of media players and organisers in my life, on both Windows and Linux platforms. I thought I’d take you through my journey to discovering the best of them all. Back when I was a young child, I can vaguely remember using Windows Media Player 6 casually, but as soon as […]

Fix ZFS Array Appearing Corrupted When Adding A Hot Spare

Yesterday I assembled a new ZFS array. It’s a 7x 1TB SATA RAID-Z1 array. Having to replace a failed drive within the first hour of the array’s life, I decided adding a hot spare would be a good idea. After installing it in the server (hotplugging) I checked with dmesg that it was detected as […]

Android With Linux is Frustrating as Hell

This is going to be a rant, so be prepared. I have to start out saying that I truly do love the Android OS and I am really pleased with it in my phone and tablet. The thing is that my tablet runs Android 4.0 Ice Cream Sandwich, whereas my phone only runs Android 2.2. […]

Simple Domain Controller With Samba

I’ve had many people ask me over the last week how to set up a simple Windows domain with a Samba primary domain controller. This is a pretty complex topic and can get really messy really fast. This “guide” (if you can call it that) assumes that you have Ubuntu 12.04 installed on a server […]