Useful Linux commands

Start Bluetooth if not already started

sudo service bluetooth start
sudo systemctl enable bluetooth
sudo systemctl status bluetooth

sudo /etc/init.d/bluetooth start

Restart Bluetooth

sudo systemctl daemon-reload
sudo systemctl restart bluetooth

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Start snap if it isnt already started

service snapd start
sudo systemctl start snapd.service

“snap-confine has elevated permissions and is not confined but should be. Refusing to continue to avoid permission escalation attacks” Error

sudo apparmor_parser -r /etc/apparmor.d/*snap-confine*
sudo apparmor_parser -r /var/lib/snapd/apparmor/profiles/snap-confine*

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“cannot change profile for the next exec call: No such file or directory

snap-update-ns failed with code 1” Error

⁠sudo apparmor_parser -r /var/lib/snapd/apparmor/profiles/*⁠⁠

To temp. start Anbox run the following from terminal

EGL_PLATFORM=x11 anbox.appmgr

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To enable syncthing type the following command replacing username with your actual username:

sudo systemctl enable [e-mail]

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To get Drive information

Used, free, & total size

df -H /mnt/SP-LIBRARY

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To load the kernel module v4l2loopback.ko

sudo modprobe -v v4l2loopback

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Using ‘rename’ command to change the file extensions of many files at once

For example to change all of the files with the JFIF extension to the JPG extension you would use the following:

rename 's/\\.jfif$/.jpg/' *.jfif

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Reload Font Cache

sudo fc-cache -fv