apinter

1. Create a systemd service and a timer unit with the below contents
2. The units must run with root so create the units under /etc/systemd/system/
3. Enable the timer only (systemctl enable --now zypper-dup-download-only.timer)
4. Use zypper dup whenever you ready to update, packages will be cached daily by the units.

Contents of zypper-dup-download-only.service:

[Unit]
Description=Download available updates

apinter

MongoDB cheatsheet

Replica Set

Perform Maintenance on Replica Set Members

apinter

Getting GCP access token from a service account key

Use your service account's key JSON file to get an access token to call Google APIs.

Good for seeing how things work, including the creation of JWT token.

To create a JWT token, you can replace create-jwt-token.sh script with tools like step.

If you just want to get an access token for a service account,

apinter

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

apinter

Convert sequence of JPEG images to MP4 video

ffmpeg -r 24 -pattern_type glob -i '*.JPG' -i DSC_%04d.JPG -s hd1080 -vcodec libx264 timelapse.mp4

• -r 24 - output frame rate
• -pattern_type glob -i '*.JPG' - all JPG files in the current directory
• -i DSC_%04d.JPG - e.g. DSC_0397.JPG
• -s hd1080 - 1920x1080 resolution

Slower, better quality

apinter

#!/bin/bash

# GUI-related packages
pkgs="
xserver-xorg-video-fbdev
xserver-xorg xinit
gstreamer1.0-x gstreamer1.0-omx gstreamer1.0-plugins-base
gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-alsa
gstreamer1.0-libav
epiphany-browser