buildah error: vfs driver does not support overlay.mountopt options
··320 words·2 mins
Buildah and podman work well with the vfs storage driver, but the default mount options can cause problems.
Linux
2019
Fedora 30 on Google Compute Engine
··877 words·5 mins
Fedora 30 is a great Linux distribution for cloud platforms, but it needs a little work to perform well on Google Compute Engine.
Build containers in GitLab CI with buildah
··882 words·5 mins
My team at Red Hat depends heavily on GitLab CI and we build containers often to run all kinds of tests.
Inspecting OpenShift cgroups from inside the pod
··1052 words·5 mins
My team at Red Hat builds a lot of kernels in OpenShift pods as part of our work with the Continuous Kernel Integration (CKI) project.
Get a /56 from Spectrum using wide-dhcpv6
··101 words·1 min
After writing my last post on my IPv6 woes with my Pixel 3, some readers asked how I’m handling IPv6 on my router lately.
Stop audio pops on Intel HD Audio
··630 words·3 mins
I recently picked up a Dell Optiplex 7060 and I’m using it as my main workstation now.
Automatic floating windows in i3
··651 words·4 mins
The i3 window manager is a fast window manager that helps you keep all of your applications in the right place.
DevConf.CZ 2019 Recap
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DevConf.CZ 2019 wrapped up last weekend and it was a great event packed with lots of knowledgeable speakers, an engaging hallway track, and delicious food.
Using the pressure stall information interface in kernel 4.20
··533 words·3 mins
Fedora 29 now has kernel 4.
2018
Make alt-arrow keys work with terminator and weechat
··278 words·2 mins
As I make the move from the world of GNOME to i3, I found myself digging deeper into the terminator preferences to make it work more like gnome-terminal.
Install testing kernels in Fedora
··465 words·3 mins
If you’re on the latest Fedora release, you’re already running lots of modern packages.
2017
Ensuring keepalived starts after the network is ready
··310 words·2 mins
After a recent OpenStack-Ansible (OSA) deployment on CentOS, I found that keepalived was not starting properly at boot time:
Troubleshooting CyberPower PowerPanel issues in Linux
··903 words·5 mins
I have a CyberPower BRG1350AVRLCD at home and I’ve just connected it to a new device.
Apply the STIG to even more operating systems with ansible-hardening
··215 words·2 mins
Tons of improvements made their way into the ansible-hardening role in preparation for the OpenStack Pike release next month.
Customize LDAP autocompletion format in Thunderbird
··296 words·2 mins
Thunderbird can connect to an LDAP server and autocomplete email addresses as you type, but it needs some adjustment for some LDAP servers.
Enable AppArmor on a Debian Jessie cloud image
··472 words·3 mins
I merged some initial Debian support into the openstack-ansible-security role and ran into an issue enabling AppArmor.
OpenStack-Ansible networking on CentOS 7 with systemd-networkd
··568 words·3 mins
Although OpenStack-Ansible doesn’t fully support CentOS 7 yet, the support is almost ready.
RHEL 7 STIG v1 updates for openstack-ansible-security
··204 words·1 min
DISA’s final release of the Red Hat Enterprise Linux (RHEL) 7 Security Technical Implementation Guide (STIG) came out a few weeks ago and it has plenty of improvements and changes.
ICC color profile for Lenovo ThinkPad X1 Carbon 4th generation
··164 words·1 min
My new ThinkPad arrived this week and it is working well!
2016
Power 8 to the people
··980 words·5 mins
IBM Edge 2016 is almost over and I’ve learned a lot about Power 8 this week.
Setting up a telnet handler for OpenStack Zuul CI jobs in GNOME 3
··522 words·3 mins
The OpenStack Zuul system has gone through some big changes recently, and one of those changes is around how you monitor a running CI job.
Bring back two and three finger taps in Fedora 24
··731 words·4 mins
Most of the recent Fedora upgrades have been quite smooth.
Lessons learned: Five years of colocation
··1958 words·10 mins
Back in 2011, I decided to try out a new method for hosting my websites and other applications: colocation.
Mouse cursor disappears in GNOME 3
··337 words·2 mins
UPDATE: The fixed version of mutter is now in the Fedora updates repository.
Recovering deleted Chrome bookmarks on Linux
··85 words·1 min
After getting a bit overzealous with cleaning up bookmarks in Chrome, I discovered that I deleted a helpful Gerrit filter for OpenStack reviews.
2015
First thoughts: Linux on the Supermicro 5028D-TN4T
··786 words·4 mins
I’ve recently moved over to Rackspace’s OpenStack Private Cloud team and the role is full of some great challenges.
Understanding systemd’s predictable network device names
··1310 words·7 mins
I talked a bit about systemd’s network device name in my earlier post about systemd-networkd and bonding and I received some questions about how systemd rolls through the possible names of network devices to choose the final name.
Research Paper: Securing Linux Containers
··456 words·3 mins
It seems like there’s a new way to run containers every week.
Book Review: Linux Kernel Development
··760 words·4 mins
I picked up a copy of Robert Love’s book, Linux Kernel Development, earlier this year and I’ve worked my way through it over the past several weeks.
Tweetdeck’s Chrome notifications stopped working
··298 words·2 mins
With the last few weeks, I noticed that Tweetdeck’s notifications weren’t showing up in Chrome any longer.
Run virsh and access libvirt as a regular user
··194 words·1 min
Libvirt is a handy way to manage containers and virtual machines on various systems. On most distributions, you can only access the libvirt daemon via the root user by default. I’d rather use a regular non-root user to access libvirt and limit that access via groups.
Share a wireless connection via ethernet in GNOME 3.14
··368 words·2 mins
There are some situations where you want to do the opposite of creating a wireless hotspot and you want to share a wireless connection to an ethernet connection. For example, if you’re at a hotel that offers only WiFi internet access, you could share that connection to an ethernet switch and plug in more devices. Also, you could get online with your wireless connection and create a small NAT network to test a network device without mangling your home network.
Lessons learned from a kernel bisection
··494 words·3 mins
I’m far from being a kernel developer, but I found myself staring down a [peculiar touchpad problem][2] with my new Dell XPS 13.
Using ZoneMinder with a Logitech C270 webcam
··272 words·2 mins
For those of you in the market for a cheap webcam for videoconferencing or home surveillance, the Logitech C270 is hard to beat at about $20-25 USD.
Linux support for the Dell XPS 13 9343 (2015 model)
··2745 words·13 mins
I’M ALL DONE: I’m not working on Linux compatibility for the XPS 13 any longer.
2014
Try out LXC with an Ansible playbook
··406 words·2 mins
The world of containers is constantly evolving lately.
Test Fedora 21 at Rackspace with Ansible
··73 words·1 min
Fedora 21 reached Alpha status last month and will reach beta status at the end of October.
Apache’s mod_proxy, mod_ssl, and BitTorrent Sync
··337 words·2 mins
BitTorrent Sync allows you to keep files synchronized between multiple computers or mobile devices.
Switching to systemd on Debian jessie
··255 words·2 mins
It seems like everyone is embracing systemd these days.
Helpful Linux I/O stack diagram
··78 words·1 min
During one of my regular trips to reddit, I stumbled upon an amazingly helpful Linux I/O stack diagram:
Docker, trusted builds, and Fedora 20
··417 words·2 mins
Docker is a hot topic in the Linux world at the moment and I decided to try out the new trusted build process.
Installing Xen on Fedora 20
··264 words·2 mins
I’ve written about installing Xen on Fedora 19 and earlier versions on this blog before.
Puppy Linux, icanhazip, and tin foil hats
··336 words·2 mins
I figured that the Puppy Linux and icanhazip.
2013
Learn octal file permissions easily with stat
··106 words·1 min
My SANS classmates were learning how to set and recognize file permissions on a Linux server and we realized it would be helpful to display the octal value of the permissions next to the normal rwx display.
One month using a Linux laptop at work: Back to the Mac
··809 words·4 mins
This post has been a bit delayed, but I want to follow up on the post I wrote last month about moving from OS X to Linux at work.
Moving from OS X to Linux: Day One
··1418 words·7 mins
The thought of using Linux as a manager in a highly Windows- and Mac-centric corporate environment isn’t something to be taken lightly.
A humble farewell to Seth Vidal
··402 words·2 mins
I was shocked to see Robyn Bergeron’s email today about Seth Vidal’s passing.