general-gnuledge

Transfer files from Arch Linux to iOS

Install dependencies:
pacman -S libimobiledevice yay -S ifuse

Enable USB service:
systemctl start usbmuxd.service

Pair:
idevicepair pair

Create a mounting directory:
mkdir /mnt/iphone

Mount phone to directory:
ifuse -o allow_other /mnt/iphone

Verify:
ls /mnt/iphone

Access files as needed.

Establishing a Wi-Fi connection with few dependencies

…assuming “wpa_supplicant” and “iw” is are available, which should be the case.

Run:
sysctl -w net.ipv4.ip_forward=1

Verify a wireless driver (i.e. wlp4s0) is available with ls /sys/class/net. A common output looks like:

enp6s0f0 lo wlp4s0

Create a temporary configuration file with nano /etc/wpa_supplicant.conf and append the following lines:

network={
	ssid="<ssid>"
	psk="<password>"
}

Connect to the previously specified <ssid> by running the following commands in order:
ip link set wlp4s0 down
ip link set wlp4s0 up
wpa_supplicant -B -i wlp4s0 -c /etc/wpa_supplicant.conf -D nl80211,wext
dhclient wlp4s0

Verify that a connection has been established. There are several ways of doing this, put a simple ping will be sufficient:
ping www.searx.be

You may now purge the temporary configuration file with rm /etc/wpa_supplicant.conf.

Access internet as needed.

Adding executables to Debian PATH

Edit .bashrc file:
nano /etc/bash.bashrc

Append text to the end of the file:
PATH=${PATH}:/<path>/<to>/<directory>
OR
export PATH=/<path>/<to>/<directory>/bin:$PATH

Re-load .bashrc file:
source /etc/bash.bashrc

Attempt to execute a binary. For elevated privelages with said binaries, enter super user mode (su):
fastboot

Accept an Android tether

Set up USB:
ip link set usb0 up

Enable USB network utilization:
dhclient usb0

Manage Android applications with ADB

Initialize ADB shell:
adb shell

Uninstall:
pm uninstall -k --user 0 <package>

Re-install:
pm install-existing <package>

ADB install:
adb install <filename>.apk

View kernel information

Kernel release:
uname -r

All available information:
uname -a

Remove lock icon from folders (change permissions)

Navigate to home folder:
cd

Find file/folder:\

find -name <filename>

Find file/folder from PWD onward:\

find . -name <filename>

Run chmod:
chmod -R a+rwx *

Adding a printer to cups from the command line

Add the printer’s I.P. address via lpadmin:
lpadmin -p <printer_name> -E -v "ipp://<ip_address>/ipp/print" -m everywhere

Check RAM speed

Run dmidecode:
dmidecode --type 17

Grant user sudo privelages

Become super user:
su

Open the sudoers file:
nano /etc/sudoers

Append permission:
<username> ALL=(ALL) ALL

PDF Conversion

PDF to JPEG:
pdftoppm -jpeg -r 300 <input.pdf> <output> JPEG to PDF:
pdftoppm '<input.pdf>' '<output>' -jpeg -r 300

GIF Conversion

GIF to JPEG:
convert -verbose -coalesce <input.gif> <output.jpeg>

File encryption

Encrpt file with GPG:
gpg -c <filename>

Decrypt file with GPG:
gpg -d <filename>

IP address information

Fetch IP metadata:
whois <ip>

Enable a paused printer (CUPS)

Find printer name:
lpstat -p

Enable printer:
cupsenable <printer_name>

yt-dlp (youtube-dl)

Download M4A in the highest quality:
yt-dlp -f 'bestaudio[ext=m4a]/m4a' <url>

Download MP4 in highest quality:
yt-dlp -f 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/m4a' <url>

Initramfs

Edit config file:
nano /etc/mkinitcpio.conf

Regenerate initramfs image:
mkinitcpio -p linux

Add connection to virt-manager

Enable and start the libvirtd service:
systemctl enable libvirtd.service %% systemctl start libvirtd.service

Add connection to virt-manager:
File -> Add Connection -> Connect

Fluidsynth and WINE

Install dependencies:
pacman -S fluidsynth soundfont-fluid

Edit config file:
nano /etc/conf.d/fluidsynth

SOUND_FONT=/usr/share/soundfonts/FluidR3_GM.sf2
OTHER_OPTS='-a alsa -m alsa_seq -r 48000'

Enable fluidsynth daemon:
systemctl –user enable fluidsynth.service systemctl –user start fluidsynth.service

Verify in WINE settings:
winecfg

Clean up folder/file structure with perl-rename:

Replace capital characters with lowercase ones, remove spaces, etc.:\ perl-rename -f 'y/A-Z/a-z/' * && perl-rename "s/_/-/g" * && perl-rename "s/ /-/g" * && perl-rename "s/---/-/g" *

Convert JPEG to WEBP

Convert:
for file in *.jpeg; do cwebp $file -o 'basename ${file%.jpeg}'.webp; done

Building from source

Navigate to source folder directory:
cd /usr/local/src

Install repository:
git clone

Build:
Autotools build system:

  $ ./configure
  $ make
  $ make install

Meson build system:

  $ meson _build
  $ cd _build
  $ ninja
  $ ninja install

Set default file explorer in GNOME

Execute:
xdg-mime default org.gnome.Nautilus.desktop inode/directory

Fetch serial number from the terminal

Execute:
dmidecode -s system-serial-number

AirMessage

To prevent Mac from sleeping when the lid is closed and connected to AC power:
caffeinate -s

General notes

“Most modern computers have at least two modes: privileged mode and user mode. In privileged mode, a program can see the actual addresses of all the memory in the system (unless there’s a hypervisor, but that’s another topic). In user mode, a program uses different addresses to refer to memory. The OS tells the MMU how to translate the addresses, so then the MMU can translate every memory address that the user program works with into actual memory addresses.” - Unknown

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