virsh in crontab for regular user
Use virsh -c qemu:///system … for everything to work if using from a users crontab (/var/spool/cron/crontabs/[username]) The user should be added to some groups as well.
Category: Software
To the unsung heroes of the world (from my AI)
A poem to the unsung heroes of the world. Unseen hands shape our daily way,Behind the scenes, they work and sway,The unsung heroes, quiet and true,Their labor of love, for me and...
Cloudkey self signed certificate
Certificate files appears to be the following two:/data/unifi-core/config/unifi-core.crt/data/unifi-core/config/unifi-core.key Not sure what /data/unifi-core/config/unifi-core-direct.key is used for.
OpenSSL
Source: https://www.ibm.com/docs/en/runbook-automation?topic=certificate-generate-root-ca-key This is for experimentation/tinkering/lab, not production. Using proper certs from the start of a project is good practice so even if this is insecure. There is the -passin file:password.txt option...
Ubuntu 22.04/libvirt/bridge network
Answered here…https://serverfault.com/questions/1113764/libvirt-with-qemu-guest-bridged-networking-does-not-work
Installing pfSense
Had problem installing pfSense 2.7.x from a usb device (memstick); waiting for cam usbus0 Had to find an older version (2.6.0, iso) to install, 2.6.0->2.7.0->2.7.2.
Running Ubuntu/Mint with pci passthrough
For the nvidia card to output something from the virtual machine I had to, of course install the proper drivers but before that I had to enable secure boot, or at least...
Ubuntu (and more?)
Missing close, maximize, minimize buttons? On right side: On left side:
More Ubuntu and zfs
Check the number of snapshots, remove the oldest five. df -h /boot zfs list -r -t snapshot -o name,used,referenced,creation bpool/BOOT zfs list -H -r -t snapshot -o name,used,referenced,creation bpool/BOOT | head -n...
Jenkins – New user
Going to try this… https://gist.github.com/hayderimran7/50cb1244cc1e856873a4 This is a snippet that will create a new user in jenkins and if security has been disabled , it will enable it 🙂 Bonus: Add the...
Jenkins plugin development
Running mvn verify on a project caused the https enforcer to kick in, not that I am using any http so I got kind of confused. Well, anyway… to get past this,...
Ansible vault editor
~/.bashrcAdd “export EDITOR=vi” or “export EDITOR=nano”, or whatever you desire.
Ubuntu and zfs
zsysctl show zsysctl state remove rpool/USERDATA/root_b59r4f@autozsys_vbqrly zsysctl state remove –system rpool/ROOT/ubuntu_3r65wz@autozsys_zi8elu zsysctl state remove –user username rpool/USERDATA/username_b59r4f@autozsys_x3699x Hope I got things the right way. Got a message stating that there isn’t enough...
CUDA – Compute Unified Device Architecture
sudo apt remove –autoremove nvidia-* Remove any cuda related from /etc/apt/sources.list.d/ sudo add-apt-repository ppa:graphics-drivers/ppa sudo apt update sudo apt install nvidia-driver-525-server sudo apt -y install nvidia-utils-525-server sudo apt -y install nvidia-settings sudo...
CUDA – Compute Unified Device Architecture
Installation https://linuxconfig.org/how-to-install-cuda-on-ubuntu-20-04-focal-fossa-linux Not entirely for 22.04LTS but with some minor modifications… However, there seems to be some issues with this way of installing nvidia/cuda. I ended up with apt stating that the...
openssl – what a… something
This took way to long to solve. A good guide but… https://networklessons.com/uncategorized/openssl-certification-authority-ca-ubuntu-server Remember to enable this: copy_extensions = copy Otherwise you’ll spend an eternity trying to figure out what is wrong. And...
Unifi – dhcp snooping
Rather annoying setting; some but not all my vm:s stopped receiving dhcp offers, apparently at random. My spontaneous guess is that this is somewhat buggy. Network -> Settings -> Networks
VScode – Cycle through tabs
ctrl+shift+pPreferences: Open Keyboard Shortcuts (JSON) Open file in new editorFile -> Preferences -> Settings [ctrl+,] workbench.editor.enablePreviewworkbench.editor.enablePreviewFromQuickOpen
Sonatype nexus3 behind nginx proxy
Sonatype nexus3 behind nginx proxy (and a little more).
Increase volume in audio file
To increase volume. ffmpeg -i input.mkv -filter:a "volume=2.5" -c:v copy output.mkv
DNF Utils, virt-manager
For Red Hat Enterprise Linux dnf install dnf-utils needs-restarting -r echo $? 0 = no reboot1 = reboot virt-manager -c 'qemu+ssh://myuser@10.11.12.13:12345/system?keyfile=id_rsa'
Mail server; dovecot, postfix etc
sudo apt -y install dovecot-core dovecot-imapd dovecot-pop3d postfix sasl2-bin sudo adduser postfix sasl systemctl restart saslauthd systemctl restart postfix /etc/postfix/sasl/smtpd.conf pwcheck_method: saslauthd mech_list: plain login And of course there’s a lot more...
Proxmox; remove cluster
systemctl stop pve-cluster corosyncpmxcfs -lrm /etc/corosync/*rm /etc/pve/corosync.confkillall pmxcfssystemctl start pve-cluster
Boot raspberrypi 4 from usb/network
sudo apt updatesudo apt full-upgradesudo rpi-update sudo rpi-eeprom-update -d -a sudo reboot sudo raspi-config
Unifi controller certificates
Unifi controller certificates (for UniFi Network, not UniFi Protect) The portal uses nginx so check out how to use certificates with nginx, the same certificates can be used, for nginx without the...
Set memory limits in docker
Edit /etc/default/grub, add/edit: GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1"
Turning off automatic upgrades
I’m using other tools for checking and upgrading so… $ sudoedit /etc/apt/apt.conf.d/20auto-upgrades From... APT::Periodic::Update-Package-Lists "1"; APT::Periodic::Unattended-Upgrade "1"; ...to... APT::Periodic::Update-Package-Lists "1"; APT::Periodic::Unattended-Upgrade "0"; ...or... APT::Periodic::Update-Package-Lists "0"; APT::Periodic::Download-Upgradeable-Packages "0"; APT::Periodic::AutocleanInterval "0"; APT::Periodic::Unattended-Upgrade "0";