Linux
From Wiki
Network Tricks
Connecting to two networks - one Wi-Fi and one wired
Wi-Fi network has internet, wired does not. Then, disable the gateway of the Wired network for internet access.
Show the networks
$ ip route show
Smaller metric number means higher priority for the gateway
Remove the gateway of the wired network
$ sudo ip route del default via 192.168.1.1
chroot into a Raspberry Pi
Mount sequence
mount /dev/sdb3 /mnt mount /dev/sdb2 /mnt/boot mount /dev/sdb1 /mnt/boot/firmware mount -o bind /proc /mnt/proc mount -o bind /sys /mnt/sys mount -o bind /dev /mnt/dev mount -o bind /dev/pts /mnt/dev/pts cp /usr/bin/qemu-arm-static /mnt/usr/bin chroot /mnt
Doing stuff in chroot
Example: Fixing a broken apt install
dpkg --configure -a apt -f install exit
Unmount sequence
umount /mnt/dev/pts umount /mnt/dev/ umount /mnt/sys umount /mnt/proc umount /mnt/boot/firmware umount /mnt/boot/ umount /mnt
Creating a desktop launcher on Gnome
Install gnome-panel
sudo apt-get install --no-install-recommends gnome-panel
Open the Create Launcher dialog and enter the details for the launcher
sudo gnome-desktop-item-edit --create-new /usr/share/applications
Done.
Trimming a video
ffmpeg can be used to trim a video from a given start time to end time.
ffmpeg -i video.webm -ss 00:00:00 -t 00:05:04 -async 1 video-cut.webm