Fedora

My main machine at home has been upgraded from Fedora 26 to 27 since the day the 27 was released. Everything has been working great, except the ZFS file system. I’m a ZFS-believer and I store my important files on ZFS-based storage. For a while there was no repository for Fedora 27 provided by zfsonlinux, until 6 days ago. I have been using packages provided for Fedora 26 as work around solution. If you’ve been using the ZFS packages for Fedora 26, you can upgrade to the ones for Fedora 27 now. ...

This is just a quick note to remind myself how to remove a Copr repository. What’s a Copr? “Copr (Cool Other Package Repo) is a Fedora project to help make building and managing third party package repositories easy.” – https://fedoraproject.org/wiki/Category:Copr. Why do I want to remove it? One of the Copr repo I added a while back seemed to be no longer working, so I wanted to remove it. # dnf update --refresh Failed to synchronize cache for repo 'tcg-themes', disabling. Last metadata expiration check: 0:00:00 ago on Fri 08 Dec 2017 11:12:45 AM AEDT. Dependencies resolved. Nothing to do. Complete! To list all repos on Fedora (27): ...

Fedora 25 has Wayland enabled by default. However, if your computer has a (good) Nvidia graphic card and want to make use of it, you’ll need to switch to Xorg and install the Nvidia proprietary driver. Note that only the Nvidia driver with the version newer than 375.20 works on Fedora 25. Ref: How do I install the Nvidia driver on Fedora 25?

After I had my Fedora 24 upgraded to 25 on my desktop, ZFS no longer worked. I tried to remove zfs package and reinstalled; it didn’t work. Here’s how I got it working after trying many things. There could be a different way to fix it, though. Let’s check the version of the kernel: [root@sangkae ~]# uname -r 4.8.13-300.fc25.x86_64 Check if spl, zfs are already installed: [root@sangkae ~]# dnf info spl Last metadata expiration check: 1:01:18 ago on Thu Dec 15 22:42:25 2016. Installed Packages Name : spl Arch : x86_64 Epoch : 0 Version : 0.6.5.8 Release : 1.fc25 Size : 48 k Repo : @System From repo : zfs Summary : Commands to control the kernel modules URL : http://zfsonlinux.org/ License : GPLv2+ Description : This package contains the commands to verify the SPL : kernel modules are functioning properly. [root@sangkae ~]# dnf info zfs Last metadata expiration check: 1:01:26 ago on Thu Dec 15 22:42:25 2016. Installed Packages Name : zfs Arch : x86_64 Epoch : 0 Version : 0.6.5.8 Release : 1.fc25 Size : 808 k Repo : @System From repo : zfs Summary : Commands to control the kernel modules and libraries URL : http://zfsonlinux.org/ License : CDDL Description : This package contains the ZFS command line utilities. Manually install spl, dkms: ...

I use ZFS as a storage driver for docker engine running on my machine. Today after my machine rebooted from a crash, yes Linux system crashes too, I notice that all my docker images and containers disappeared. ~ ❯❯❯ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES ~ ❯❯❯ docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES First thing came to my mind was “did I accidentally destroy docker zfs data set last night?” ...