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committer@tuxwarrior 9720dece3e docs moved from trillium / vikujna to repo

2026-04-01 07:39:08 -05:00

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nifty

ant (garmin)

antfs-cli --pair - pair watch to pc
antfs-cli --upload - upload data to pc
- files are transferred to ~/.config/antfs-cli/[device_id]/activities

src:

https://gitlab.com/klevstul/privateIssues/issues/400#note_255420822

batch resize and compress images

mkdir converted;for photos in *.jpg;do convert -verbose "$photos" -quality 90% -resize 1920x1080 ./converted/"reduced_$photos"; done

src:

https://linuxsuperuser.com/batch-resize-compress-photos-linux/

bluetooth

$ sudo systemctl start bluetooth
$ bluetoothctl
[bluetooth]# power on
[bluetooth]# scan on
[bluetooth]# pair 40:C1:F6:7A:37:E6
[bluetooth]# connect 40:C1:F6:7A:37:E6
[JBL Go 3]#
...
[bluetooth]# devices
Device B8:D5:0B:D0:06:B0 HK Onyx Studio 3
[bluetooth]# connect B8:D5:0B:D0:06:B0

change cursor pointer theme

$ appearance-menu

chmod

The Octal digits used for assigning permissions are as follows:

Octal Digit	Permissions
7	rwx
6	rw-
5	r-x
4	r--
3	-wx
2	-w-
1	--x
0	(none)

dmenu - run mode & cache

update if app runs in background or using terminal

ls ~/.config/dmenu-recent/ [background* | terminal*] in these files the commands are defined or stored, and you can edit them.

edit / delete cahced entries, located in: ~/.cache/dmenu-recent/

drive and file management

automount:
- automount harddrive on startup
partitioning:
- using gparted, create new partition table of type gpt, then create a new ext4 partition.
access rights
- $ sudo chown 1000:100 /run/media/klevstul/cacheDrive/
- $ sudo chmod 755 /run/media/klevstul/cacheDrive/
iso checking
- download both the .iso and the related .md5 file
- md5sum -c filename.iso.md5
iso burning: (to usb thumb drives)
- lsblk (locate drive letter)
- sudo dd bs=4M if=/path/to/manjaro.iso of=/dev/sd[driveLetter] status=progress oflag=sync
secure delete:
- srm -i -v file.txt
size of directories:
- du -sh /home/klevstul/* | sort -hr
- du -sh .[!.]* * | sort -hr (calculating current dir, standing in ~/home dir - includes hidden system folders)
- du -h --max-depth=1
- du -h --max-depth=1 /media/drive2/cloud-drive/Dropbox/
- ref: https://linuxconfig.org/list-all-directories-and-sort-by-size

debugging

run sudo dmesg -w - then, plug in the usb and check the output messages

run lsusb to see if the usb is listed

run lsblk to see if the usb is listed

diff

diff --brief --recursive /media/nas/cb/cbdb /media/drive2/nass/cb/cbdb

src: https://www.baeldung.com/linux/compare-two-directories

encryption/decryption

symmetric

# zip and encrypt
$ 7za a archive.7z directory/
$ gpg -c archive.7z # `-c` is the same as `--symmetric`

# decrypt and unzip
$ gpg -d archive.7z.pgp > archive.7z
$ 7za x archive.7z

key

first time setup

gpg --gen-key
  Real name: Frode Klevstul`
  Email address: frode@klevstul.com`

  gpg: revocation certificate stored as '/home/poq/.gnupg/openpgp-revocs.d/2C6781ED21DF77ADA325BB8F7B048108A509A75D.rev'
  public and secret key created and signed.

  pub   ed25519 2025-11-10 [SC] [expires: 2028-11-09]
        2C6781ED21DF77ADA325BB8F7B048108A509A75D
  uid                      Frode Klevstul <frode@klevstul.com>
  sub   cv25519 2025-11-10 [E] [expires: 2028-11-09]

use existing key

encrypt/decrypt

encrypt: $ gpg --encrypt --sign --recipient frode@klevstul.com test.txt
- (pre nov 25: $ gpg --encrypt --sign --recipient frode@thisworld.is test.txt)
decrypt: $ gpg --output out.txt --decrypt test.txt.gpg

backup

simple:
- make a backup of the folder ~/.gnupg

or, alternatively:

having opened the cryptLocal cryptomator vault, do the following to back up the key:

cp -r /home/poq/.gnupg/openpgp-revocs.d/2C6781ED21DF77ADA325BB8F7B048108A509A75D.rev /home/poq/.local/share/Cryptomator/mnt/cryptLocal/content/keys/openPgp/.gnupg
gpg --armor --export frode@klevstul.com > /home/poq/.local/share/Cryptomator/mnt/cryptLocal/content/keys/openPgp/.gnupg/251110_frodeKlevstul_publicKey.asc
gpg --armor --export-secret-keys frode@klevstul.com > /home/poq/.local/share/Cryptomator/mnt/cryptLocal/content/keys/openPgp/.gnupg/251110_frodeKlevstul_privateKey.asc

git

initialise new repository

git init .
git add -A
git commit -am "Initial commit"
git push

ref: https://stackoverflow.com/questions/65033357/git-init-new-from-existing-repository

hard drive

use gnome-disk-utility

src:

https://forum.manjaro.org/t/solved-how-to-encrypt-an-external-hard-drive-in-manjaro/120058

feh (image viewer)

feh -d --draw-exif --draw-tinted --recursive

find/grep/search

find

example how to search in files, locating files of type .desktop containing gitkraken:
[klevstul@x270mjr ~]$ find / -name '*.desktop' -exec grep -H 'gitkraken' {} \; 2>/dev/null
another search, this time for a string in files:
root@humhub:~# find /var/www/humhub/ -type f -exec grep -l "initial_password" {} \;

grep -rniw

search for file containing pagan: [klevstul@silentGamerMjr ~]$ grep -rniw '/run/media/klevstul/raid/Dropbox/gitlab/myPlaylists/' -e 'pagan' src: https://unix.stackexchange.com/questions/524828/what-does-grep-w-do

grep -rni

grep -rni "text string" /path/to/directory src: https://www.linuxjournal.com/content/how-search-and-find-files-text-strings-linux

ffmpeg commands

webm to mp4 conversion using ffmpeg
- ffmpeg -fflags +genpts -i 1.webm -r 24 1.mp4 |
Converting mkv to h264 FFmpeg
- ffmpeg -i input.mkv -c copy output.mp4 (fast - no conversion)
- ffmpeg -i input.mkv -c:v libx264 -c:a aac output.mp4 (recompiling)
How can I reduce a video's size with ffmpeg?
- ffmpeg -i input.mp4 -vcodec libx265 -crf 28 output.mp4
Scaling
- ffmpeg -i input.mp4 -vf scale=320:240,setsar=1:1 output.mp4

fonts

alt 1: install from aur (often starts with otf- (preferred) or ttf-)
alt 2: add fonts to ~/.local/share/fonts or /usr/share/fonts
- maybe: restart application or run fc-cache

git

git commit -a -m "upd"
git push origin master

touch README.md
git init
git checkout -b main
git add README.md
git commit -m "genesis"
git remote add origin ssh://git@gt.op.fo:2002/fro/hyprarco.git
git push -u origin main

src: https://www.atlassian.com/git/tutorials/saving-changes/git-commit https://www.atlassian.com/git/tutorials/syncing/git-push

networking (inc wifi)

ifconfig -a (alternative to windows' ipconfig -all)
route -n (get info about gateway)
nmtui - to open an interactive ui for connecting to wifi
nm-connection-editor - network manager gui applet
nm-applet - toolbar applet
sudo systemctl restart NetworkManager - restart network

openssh

generate keypair: $ ssh-keygen -t rsa -b 2048

view the public key: $ less /home/klevstul/.ssh/id_rsa.pub

copy this public key to .ssh/authorized_keys on the remote server.

pacman, aur & yay

misc commands

sudo pacman -Syyu - sync and upd
sudo pacman -Syuu - sync, update and allow downgrades
sudo pacman -Rns <name> - uninstall
sudo pacman -Rs $(pacman -Qqdt) - remove unused packages (WARNING: can remove too much!)

-S: Sync packages
-y: refresh package database
-uu: sys upgrade all packages, repeated 'u' flag enables downgrades

updating mirrors

ct s mirrors
- this command triggers rate-mirrors and updating of mirrorlist
use web
- https://archlinux.org/mirrorlist/

cache clearing

pacman
- sudo trash-put /var/cache/pacman/pkg/*
yay
- trash-put .cache/yay/*

avoids errors like:

==> Validating source files with sha256sums...
    tuxedo-drivers-dkms-4.13.1.tar.gz ... FAILED
==> ERROR: One or more files did not pass the validity check!

aur: manual installation of packages

if .tar.gz
- cd /media/cacheDrive/buildDir/
- wget [link_to_aur_snapshot_tar_gz]
- tar -xvzf [package.tar.gz]
- cd [package/]
- makepkg -si PKGBUILD (-s syncdependencies, -i install)
if .git
- cd /tmp
- git clone https://aur.archlinux.org/yay.git
- cd yay
- makepkg -si

Troubleshooting: Error: FAILED (unknown public key 615D449FE6E6A235) Fix: gpg --recv-keys 615D449FE6E6A235

yay

Search for packages with:

yay search_term

Install the packages with:

yay -S package_name

Remove packages with:

yay -R package_name

To delete a package with its dependencies:

yay -Rns package_name

Upgrading (only) the AUR packages:

yay -Sua

ERROR: One or more files did not pass the validity check!

cd /tmp/
git clone https://aur.archlinux.org/microsoft-azure-vpn-client-bin.git
cd microsoft-azure-vpn-client-bin/
updpkgsums
makepkg -si

printers (cups)

http://localhost:631/admin (admin) - login: poq/poq.L1
- http://localhost:631/printers/Brother_HL-L2310D_series (manage brother)

processes

ps aux
- ps aux | grep 'pulse'
top
htop
pstree
kill:
- pstree -p
- kill [PID] or kill -9 [PID]

qt library

error: Cannot mix incompatible Qt library (5.15.5) with this library (5.15.6)
fix: pamac build qt5-styleplugins

$ rename -help

Usage:
 rename [options] <expression> <replacement> <file>...

Rename files.

Options:
 -v, --verbose       explain what is being done
 -s, --symlink       act on the target of symlinks
 -n, --no-act        do not make any changes
 -a, --all           replace all occurrences
 -l, --last          replace only the last occurrence
 -o, --no-overwrite  don't overwrite existing files
 -i, --interactive   prompt before overwrite

 -h, --help          display this help
 -V, --version       display version

example, rename .265 to .265.mp4 for all files in a directory:
rename -n -v '.265' '.265.mp4' *

services

list: systemctl list-units --type service --all
enable: sudo systemctl enable nohang-desktop
start: sudo systemctl start nohang-desktop

shortcuts

atom
shotcut

verify files using signature

signify -Cqp factory.pub -x crosshatch-factory-2020.05.05.02.zip.sig && echo verified
requires signify (comminity tool)
ref: https://grapheneos.org/install

sound

list sound cards

cat /proc/asound/cards
aplay -L or arecord -L (list cards and devices)

set default sound card

asoundconf set-default-card [card_name]
- example: asoundconf set-default-card R14PM
speaker-test -c 2 (test default card)

speaker test

speaker-test -Dfront:R14PM -c 2 (test two channel front speakers on card R14PM)
- example: front:CARD=R14PM,DEV=0, R-14PM, USB Audio, Front speakers
pavucontrol - pulse audio volume control

ssh

$ ssh -l [username] -p [port] [ip]
on host machine: $ export TERM=xterm

symbolic links

$ ln -s /path/to/original_source /path/to/link_target
eg: $ ln -s /home/klevstul/.config/STAMP . (create a link to STAMP in current folder)

swap

status: swapon
disable: sudo swapoff /dev/dm-1
enable: sudo swapon /dev/dm-1
turn off: comment out in sudo nano /etc/fstab
change size: use GParted

src: archlinux.org

terminal

issue on remote machine

problem: Error opening terminal: xterm-kitty.
solution: # export TERM=xterm

theme change

either find a theme in aur/arc, or download a theme, like:
- https://www.gnome-look.org/p/1253385
extract theme to /home/poq/.themes
same thing for icons:
- https://www.opendesktop.org/p/1305251
extract to /home/poq/.icons
run lxappearance and update widget and icon theme
$ export GTK_THEME=Sweet-Dark-v40:dark
- (or, this might be sufficient: $ export GTK_THEME=Sweet-Dark-v40)
$ sudo nano /etc/environment
- set: GTK_THEME=Sweet-Dark-v40:dark

src: https://gitlab.com/pqq/pIssues.2/-/issues/113

tor with firefox

$ systemctl start tor
foxyproxy: socks5 w/ dns 127.0.0.1:9050
test: curl --socks5-hostname localhost:9050 https://check.torproject.org

src: devdungeon.com

vpn

protonvpn

download config file from https://account.protonvpn.com/downloads (gnu/linux, udp)
locate username and password at https://account.protonvpn.com/account#passwords
left click connection icon in status bar, choose:
- vpn connection > add a vpn connection > import a saved vpn configuration
- navigate to the downloaded config > select it > enter your protonvpn username (OpenVPN / IKEv2 username) and password (OpenVPN / IKEv2 password)

src:

https://protonvpn.com/support/linux-vpn-setup/

stuck / blocked connection

(uninstall protonvpn client)
nmcli connection show --active
Remove any reference to protonvpn
- nmcli connection delete [name-of-connection]
  - example: nmcli connection delete pvpn-ipv6leak-protection

[poq@t470p ~]$ nmcli con
NAME                   UUID                                  TYPE      DEVICE
.TigoWiFi-370758465/0  aa456038-fcb0-4d1c-ad6d-18d7ad3dbadd  wifi      wlp3s0
lo                     6105f6f5-49b6-4f52-9b9d-cee491d5ccdd  loopback  lo
-_-                    d7e4b5f1-7e74-4299-833c-7b7a37ea2ab2  wifi      --
Proton VPN CO#20       509b5321-be73-4969-afec-e0a7c4de86d9  vpn       --
Wired connection 1     4395f2d8-010b-3809-9a5b-b786b5447faa  ethernet  --

[poq@t470p ~]$ nmcli connection delete 509b5321-be73-4969-afec-e0a7c4de86d9
Connection 'Proton VPN CO#20' (509b5321-be73-4969-afec-e0a7c4de86d9) successfully deleted.

wacom configuration

use command xsetwacom list devices to find the id for type 'stylus' and map that to main monitor 'HEAD-0'.

example:

$ xsetwacom list devices
Wacom Intuos3 6x11 Pen stylus   	id: 9	type: STYLUS
Wacom Intuos3 6x11 Pad pad      	id: 10	type: PAD
Wacom Intuos3 6x11 Pen eraser   	id: 15	type: ERASER
Wacom Intuos3 6x11 Pen cursor   	id: 16	type: CURSOR

$ xsetwacom set "9" MapToOutput HEAD-0

requires:

xf86-input-wacom

src:

x11 keyboard key names

xev lets you find the keycode / keysym of a key.

src:

http://xahlee.info/linux/linux_show_keycode_keysym.html

example of mediakeys (when pressing fn):

XF86AudioRaiseVolume
XF86AudioLowerVolume
XF86AudioPlay
XF86AudioPrev
XF86AudioNext
XF86AudioStop

17 KiB Raw Permalink Blame History

nifty

ant (garmin)

batch resize and compress images

bluetooth

change cursor pointer theme

chmod

dmenu - run mode & cache

drive and file management

debugging

diff

encryption/decryption

symmetric

key

first time setup

use existing key

encrypt/decrypt

backup

git

initialise new repository

hard drive

feh (image viewer)

find/grep/search

find

grep -rniw

grep -rni

ffmpeg commands

fonts

git

networking (inc wifi)

openssh

pacman, aur & yay

misc commands

updating mirrors

cache clearing

aur: manual installation of packages

yay

ERROR: One or more files did not pass the validity check!

printers (cups)

processes

qt library

services

shortcuts

verify files using signature

sound

list sound cards

set default sound card

speaker test

ssh

symbolic links

swap

terminal

issue on remote machine

theme change

tor with firefox

vpn

protonvpn

stuck / blocked connection

wacom configuration

x11 keyboard key names

17 KiB

Raw Permalink Blame History