Initialization

Base

# Disable login password
sudo groupadd -r autologin
sudo gpasswd -a $USER autologin
# /etc/lightdm/lightdm.conf
[Seat:*]
autologin-user=vlad

# Scale apps on HDPI
# /etc/profile.d/gtk.sh
export GDK_DPI_SCALE=1.33

# Disable wakeup on Logi Bolt
sudo cp ~/.dotfiles/base/logibolt.rules /etc/udev/rules.d

# Enable options in /etc/pacman.conf
Color CheckSpace VerbosePkgLists ParallelDownloads = 4
# Disable [multilib]
# Update package repositories
sudo pacman -Syyu
# Update installed packages and remove unused packages
yay --noconfirm -Syu && yay --noconfirm -Sc && yay --noconfirm -Yc

# Install packages
yay -S wezterm fish nushell starship emacs-nativecomp
yay -S aspell aspell-en aspell-es aspell-uk aspell-ru
yay -S hunspell hunspell-en_us hunspell-es_es hunspell-uk hunspell-ru
yay -S ttf-jetbrains-mono-nerd noto-fonts-emoji
yay -S fzf fd ripgrep eza bat git-delta vivid plocate btop go-yq
yay -S lf zathura zathura-pdf-mupdf zathura-djvu gthumb inkscape
yay -S nodejs pnpm bun-bin typescript typescript-language-server
yay -S go gopls
yay -S go-ethereum solidity-bin
yay -S jdk-openjdk intellij-idea-community-edition
yay -S dropbox

# Install dotfiles
git clone [email protected]:volodymyrprokopyuk/dotfiles.git ~/.dotfiles
cd ~/.dotfiles && ./config --init all -i

i3wm

# Set font scaling DPI (multiple of 96) in ~/.Xresources
Xcursor.theme: Qogir
Xcursor.size: 48
Xft.dpi: 192

# Install packages
yay -S xorg-xev i3status-rust i3lock-color maim

# Query MIME of a file
xdg-mime query filetype file.pdf
# List installed applications
fd -t f -e desktop . /
# Query default application for a file
xdg-mime query default application/pdf
# Set default applications for a file
xdg-mime default org.pwmt.zathura.desktop application/pdf
xdg-mime default org.pwmt.zathura.desktop image/vnd.djvu
xdg-mime default org.gnome.gThumb.desktop image/png
xdg-mime default org.gnome.gThumb.desktop image/jpeg
xdg-mime default org.gnome.gThumb.desktop image/svg+xml

Commands

yay

# Update a repository database
yay -Sy
# Upgrade a system
yay -Syu
# Show packages to upgrade
yay -Qu

# Clean a package cache
yay -Sc
# Clean unneeded dependencies
yay -Yc

# Search a remote repository database for a package
yay -Ss|i <package>
# Query a local repository database for an installed package
yay -Qs|i <package>
# Show explicitly installed packages
yay -Qe

# Install a package
yay -S <package>
# Remove a package, its configuration, and dependencies
yay -Rsn <package>

# List all files owned by a package
yay -Ql <package>
# Show which package a file belongs to
yay -Qo <file path>
# Show dependency tree of a package
pactree <package>
# Show packages that depend on a package
pactree -r <package>

Network

nmcli device # list devices => connections
nmcli connection # list connections => devices
nmcli connection up|down <connection> # adtivate/deactivate connection
nmcli radio wifi on|off # switch on/off WiFi
nmcli device wifi # list avaialble WiFi networks
nmcli --ask device wifi connect <network> # connect to network

Mount

sudo fdisk -l # list devices
ll /dev/disk/by-uuid/* # list device UUIDs
sudo mkdir /run/media/HD1 # create a mount point
sudo mount -t ext4 /dev/sda3 /run/media/HD1 # mount a device
df -h # verify mount success; show storage space usage
sudo umount /run/media/HD1 # unmount a device
# /etc/fstab
UUID=aa295f1c-3f40-4a02-b91c-a57c657ec247 /run/media/HD1 ext4 defaults 0 0
UUID=cbb67744-1bb8-42b8-ba94-bb97071404b2 /run/media/SD1 ext4 defaults,nofail,x-systemd.device-timeout=1 0 0
sudo mount /run/media/HD1 # mount a device from fstab
sudo mount -a # mount all devices from fstab
du -hd 1 # show directory size to depth

Format

df -h
sudo umount /dev/sdc1
sudo mkfs.ext4 /dev/sdc1

Users and groups

# Show users
cat /etc/passwd
# Show groups
cat /etc/group
# Show groups that user belongs to
groups $USER

systemd management

# Show services
systemctl [list-units] --type=service --state=active
# Manage service
sudo systemctl enable|start|status|stop|restart|disable $SERVICE.service

SSH configuration

Install and use locally generated SSH key on a remote server

# Generate SSH key pair locally
# Provide SSH key file location ($HOME/.ssh/id_rsa_<provider>) and passphrase
# File parmissions
chmod 700 ~/.ssh && chmod 600 ~/.ssh/id_*
ssh-keygen -t rsa -b 4096 -C "[email protected]"
ssy-keygen -t ed25519 -C "[email protected]"
# Copy SSH key to a remote host. Provide remote host username and password
ssh-copy-id -i ~/.ssh/id_rsa_<provider>.pub <username>@<host>
# Connect to the remote host using SSH key but not password. Provide passphrase
ssh -i ~/.ssh/id_rsa_<provider> <username>@<host>
# Configure SSH key alias in ~/.ssh/config
Host <alias>
    HostName <host>
    User <user>
    IdentityFile ~/.ssh/id_rsa_<provider>
# Connect to the remote host using SSH key alias. Provide passphrase
ssh <alias>
# Test SSH connection using SSH key
ssh -T <alias>

Add private SSH key identities to the SSH authentication agent

# Start SSH authentication agent
eval $(ssh-agent)
# Add private SSH key identities to the SSH authentication agent. Provide passphrase
ssh-add ~/.ssh/id_rsa*~*.pub
# Show added to the SSH authentication agent private SSH key identities
ssh-add -l

SSH tunneling (port forwarding)

• SSH tunneling transports arbitrary data between authenticated SSH client and authenticated SSH server over an untrusted network through an encrypted SSH connection (confidentiality, integrity). SSH tunneling provides secure connections to internal services from the outside
• SSH client forwards connections to a configured localhost:port to an SSH server through an encrypted SSH connection
• SSH server connects to a configured server:port e.g. DB

ssh -L [localIP:]localPort:destServer:destPort [sshUser@]sshServer

Applications

Fish

Movements

• C-f|b forward/backward char
• A-f|b forward/backward word
• C-a|e beginning/end of line

Deletion

• C-k|u delete forward/backward line
• C-w delete backward word
• C-z undo the last edit

History

• C-p|n previous/next history command
• C-r search command history
• C-g cancel operation

Program

• C-c terminate program
• C-d end input stream
• C-l clear screen

Completion

• Tab/S-Tab forward/backward completion
• M-m/, forward/backward completion

Doom Emacs TODO

Scrolling

• C-e|y forward/backward line
• C-f|b forward/backward full screen
• C-d|u forward/backward half screen

Motions

/- h|l left / right character /- [g]j|k down / up [visual] line

• w|b beginning of the next / previous word + W|B on whitespace only
• e|ge end of the next / previous word + E|gE on whitespace only
• ^|$ beginning / end of the current line content
• 0 0 position of the current line
• % jump between parentheses
• zz current line in the middle of the screen
• H|M|L move cursor to high / middle / low of the screen

Text objects

• i|aw|s|p|t inside / around word / sentence / paragraph / tag + ([{<"''">}]) ``

Surround

• ys|S<obj> add surrounding in normal / visual mode
• c|ds<sur> change / delete surrounding in normal mode

Visual mode

• v|V|C-v char / line / block visual selection
• C-v $ ragged right visual selection
• o go to the other end of selection
• gv re-select the last visual selection

Navigation

• f|F current line 1-char snipe forward / backwrd
• t|T current line 1-char exclusive snipe forward / backwrd
• s|S current line 2-char snipe forward / backwrd
• ;|, repeat last snipe forward / backwrd
• g s s visible screen 2-char snipe
• g s / visible screen timer snipe
• g;|, jump to last modification backwrd / forward (change list)
• C-o|i jump to last location backwrd / forward (jump list)
• m|'|`{a-z} set mark / jump to mark line / column

Search

• *|# search word under cursor forward / backwrd
• /|? incremental search forward / backwrd
• n|N repeat last search forward / backwrd
• :s/pattern/replace/gc substitute pattern with replace (global, confirm)
• & repeat last substitution on the current line
• SPC s s search buffer
• SPC s S search buffer (word under cursor)
• SPC / search project
• SPC SPC find file in project (git)
• SPC . find file in directory (no git)
• SPC s f locate file in system
• q:|/|? j|k query recent command line / forward / backwrd search

Editing

• :e edit existing or new file
• :w[a] write file
• C-x C-c exit Doom Emacs

Repeat, undo/redo

• . repeat the last change
• u undo the last change
• C-r redo the last undone change

Yank/paste, registers

• y<move>|Y yank till move / till the end of current line
• yy yank current line
• p|P paste after / before cursor

Insertion

• i|I insert at cursor / at the beginning of current line
• a|A append at cursor / at the end of current line
• o|O open new line below cursor / above cursor

Change

• c<move>|C change till move / till the end of current line
• cc change current line
• gu|U<move> downcase / upcase till move
• guu|UU downcase / upcase current line
• J join lines

Deletion

• x delete character under cursor
• d<move>|D delete till move / till the end of current line
• dd delete current line

Indentation and formatting

• >|<<move> indent / dedent move
• >>|<< indent / dedent current line
• =<move> format move

Commenting

• gc<move> comment / uncomment move
• gcc comment / uncomment current line

Buffers

• SPC , switch buffer
• SPC ` switch to alternate buffer
• C-x k kill buffer

Windows

• C-w s|v split window horizontal / vertical
• C-w = equalize windows
• C-w w|h|j|k|l cycle / move between windows
• C-w c close active window
• C-w r rotate windows
• C-x 0|1 close other / active window

Evil mode
Tab complete the common part of suggestion list
Enter complete with the selected suggestion
C-SPC trigger completion window
M-q format width of the selected text
Ctrl-y paste into the mini buffer
Motions within a buffer
  Word/backwrd/end: w/W, b/B, e/E, ge/gE
  Beginning/end of line: 0, ^, $,
  Search single char in current line: f/F, t/T -> ;/,
  Search regexp in a buffer: /?, */# -> n/N
Text objects: i/a w/s/p/t '/"/` )/}/]/>
  Change inside: ci_
  Delete around: da_
Operator + motion/text object: y, c, d, >, <, =, gc + w, it
Operator + operator: acts on the current line: cc, dd, >>, <<, ==, gcc, guu, gUU, g~~
Marks: m[mM]
  m mark in a buffer
  M global mark
  `m (go to marked position)
Change list in a buffer: g;/g,
Jump list between buffers in a window: Ctrl-o/Ctrl-i
Registers: "ryy, "rp
  r overwrite
  R append
Shift-r (replace mode: . A Shift-r , a)
q: (query and edit ex command history)
q/ (query and edit search history)
Insert mode/command line mode
  Alt-b, Alt-f (backwrd, forward word)
  Ctrl-w (delete word backwrd)
  Ctrl-r "/0 (paste unnamed/yank register)
Visual mode (should only be used when normal mode standard motions are not enough)
  o (other end of selection)
  Ctrl-v $ (ragged selection)
F1 k <key> show key binding
Evil surround
Normal mode: ys, cs, ds
Visual mode: S
Evil commenter
gcc comment a line
gc<movement> comment a movement
gc<a/i>(/[/{ comment outside/inside parentheses/brackets/braces

Zathura

Operation

• o|O open recent files/in current directory
• R reload document
• C-c|g cancel operation
• C-n toggle status bar
• F11|F5 toggle full screen/presentation mode
• q quit

Movements

• h|j|k|l scroll left/down/up/right
• C-f|b, Space|S-Space scroll forward/backward page
• C-d/u scroll forward/backward half page
• J|K|H|L scroll next/previous/top/bottom page

Navigation

• gg|G|<n>G go to first/last/n page
• m<a>|'<a> mark page/go to marked page
• C-i|o go to next/previous jump list item

Transformation

• a|s|d fit page height/width/dual view
• +|-|=|<n>= zoom in/out/original size/% size
• r rotate document

Search

• /|? search forward/backward
• n|N go to next/previous match

Index

• Tab toggle index view

• j+k|l+h move down/up, expand/collapse entry

• L+H expand/collapse all entries

• convert in.jpg -rotate 90 -resize 1600 -crop 1450x2100+50+33 -threshold 60% -quality 70% cert.pdf

Environments

PostgreSQL

# Install PostgreSQL server, client and tools
yay -S postgresql
# Create PostgreSQL data directory
sudo mkdir /var/lib/postgres/data
sudo chown -R postgres:postgres /var/lib/postgres/data
sudo chmod 755 -R /var/lib/postgres/*
# Initialize PostgreSQL database cluster
sudo su postgres
initdb --locale en_US.UTF-8 --encoding UTF-8 -D /var/lib/postgres/data
exit
# Enable/disable/start/stop/restart/status PostgreSQL database service
sudo systemctl enable|disable|start|stop|restart|status postgresql.service
# Show PostgreSQL log
journalctl -u postgresql.service
# Create database user
psql postgres postgres
CREATE USER vlad WITH PASSWORD 'vlad' SUPERUSER;
exit
# Create database
psql postgres vlad
CREATE DATABASE playground WITH OWNER vlad;
exit
# Connect to database
psql playground vlad
# Dump database schema
pg_dump -U vlad --schema-only playground > playground_dump_schema.sql
# Restore database schema
psql -h localhost -p 5432 -f playground_dump_schema.sql \
    -v ON_ERROR_STOP=1 -v ECHO=queries playground vlad

psql commands

• General \c, \conninfo, \du, \dx \l, \dn, \g, \r, \q
• Relations \d, \dtvmi
• Functions \df, \dfnptaw, \sf
• Editing \e, \ef