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‎Notes/tech/coding/kotlin.md

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# Kotlin
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### Optional API
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Source:
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https://4comprehension.com/kotlins-java-util-optional-equivalents/
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val x: Int? = 7 // ofNullable()
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val result = x
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?.let { ... } // map()
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?.takeIf { ... } // filter()
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?: 42 // orElseGet()
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### next

‎Notes/tech/coding/make.md

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# Make
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CFLAGS += -Wall -Wextra
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LDLIBS = -lcurses
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OBJS = foo.o bar.o baz.o
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foo: $(OBJS)
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$(CC) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $@
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foo.o bar.o: foo.h
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clean:
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rm -f $(OBJS) foo

‎Notes/tech/coding/maven.md

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# Maven
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### Build subproject with dependencies include
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```bash
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mvn clean install -pl [project name] -amd
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```
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### Change project version
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```bash
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mvn versions:set -DnewVersion=1.1.0 && mvn versions:commit
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```

‎Notes/tech/coding/rust.md

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## Rust notes
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Source: (Wrapper types)[https://manishearth.github.io/blog/2015/05/27/wrapper-types-in-rust-choosing-your-guarantees/]
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### Wrapper types
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**Box** This abstraction is a low cost abstraction for dynamic allocation. If you want to allocate some memory on the heap and safely pass a pointer to that memory around, this is ideal.
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**Rc** is a reference counted pointer for multiple owning.

‎Notes/tech/linux/10things_arch.md

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# 10things arch
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Check your current kernel:
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uname -r
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# 1. Install an LTS kernel and reconfigure grub:
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sudo pacman -S linux-lts
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sudo grub-mkconfig -o /boot/grub/grub.cfg
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You may also install linux-lts-headers.
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Reboot and check which kernel is in use with uname -r.
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Remove non-lts kernel
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sudo pacman -Rs linux
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# 2. Install Microcode
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For intel processors with grub boot loader:
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sudo pacman -S intel-ucode
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sudo grub-mkconfig -o /boot/grub/grub.cfg
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For AMD processors install linux-firmware package.
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# 3. Disable GRUB delay
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Add the following to /etc/default/grub:
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achieve the fastest possible boot:
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GRUB_FORCE_HIDDEN_MENU="true"
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Then put file 31_hold_shift to /etc/grub.d/.
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Download 31_hold_shift https://goo.gl/nac6Kp
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Make it executable, and regenerate the grub configuration:
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sudo chmod a+x /etc/grub.d/31_hold_shift
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sudo grub-mkconfig -o /boot/grub/grub.cfg
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# 4. Install some key packages
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sudo pacman -S adobe-source-sans-pro-fonts aspell-en enchant gst-libav gst-plugins-good hunspell-en icedtea-web jre8-openjdk languagetool libmythes mythes-en pkgstats ttf-anonymous-pro ttf-bitstream-vera ttf-dejavu ttf-droid ttf-gentium ttf-liberation ttf-ubuntu-font-family
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# 5. Set up firewall
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Install ufw:
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sudo pacman -S ufw
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Enable it.
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sudo ufw enable
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Check its status:
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sudo ufw status verbose
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Enable the start-up with the system:
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sudo systemctl enable ufw.service
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Reboot and check the status again. It should be active.
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# 6. Encrypt your home directory
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Logged out. Switch to a console with Ctrl+Alt+F2. Login as a root and check that your user own no processes:
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ps -U username
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Install the necessary applications:
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sudo pacman -S rsync lsof ecryptfs-utils
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Then encrypt your home directory:
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modprobe ecryptfs
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ecryptfs-migrate-home -u username
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Mount your encrypted home.
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ecryptfs-mount-private
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Unwrap the passphrase and save it somewhere where only you can access it.
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ecryptfs-unwrap-passphrase
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Run
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ls .ecryptfs
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Edit /etc/pam.d/system-auth:
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After the line "auth required pam_unix.so" add:
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auth required pam_ecryptfs.so unwrap
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Above the line "password required pam_unix.so" insert:
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password optional pam_ecryptfs.so
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After the line "session required pam_unix.so" add:
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session optional pam_ecryptfs.so unwrap
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Reboot and make sure that you can login to your desktop
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# 7. Remove orphans
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sudo pacman -Rns $(pacman -Qtdq)
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# 8. Optimize pacman's database access speeds
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sudo pacman-optimize
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# 9. Check for errors
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sudo systemctl --failed
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sudo journalctl -p 3 -xb
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# 10. Backup the system
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sudo rsync -aAXvP --delete --exclude=/dev/* --exclude=/proc/* --exclude=/sys/* --exclude=/tmp/* --exclude=/run/* --exclude=/mnt/* --exclude=/media/* --exclude=/lost+found --exclude=/home/.ecryptfs / /mnt/backupDestination/

‎Notes/tech/linux/apps.md

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# Apps
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https://contao.org/de/
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http://www.zentyal.org/
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http://www.univention.de
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Ninite - Software Installation
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Zoneminder - Video Betriebssystem
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Froxlor - alt. SysCP
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http://www.yaml.de/
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Django
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MarkdownPad2
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Nfon
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Prezi.com
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J Language
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MS Mathematics
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PapDesigner
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Trello - Aufgaben Manager
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SOGo/ZAG
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openHAB Hausautomation
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Glympse - live Standort mitteilen
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speedof.me - html5 speedtest
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Bodhi
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Hiren's BootCD From USB
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ceph
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Mirantis
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Xming - XServer für putty
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skjlls.com - eigene Kompetenz in Euro messen
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reveal.js - HTML Presentation
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Dynv6 - dyndns
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Skuawk.com - bildportal
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Solusproject
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ElementaryOS (arc theme)
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Wallpaper pattern http://subtlepatterns.com/
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Audials - rip spotify
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Homematic/honeywell haus automation
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ApricityOS
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Mattermost - Slack OS alternative
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mutt - email
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pass - Passwordstore
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Phacility/Phanricator - PM Tool
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Yubikey - usb passwortmanager
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Canary Mail
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Veertu - macOS Ein virtualization
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HackerOne/BugCrowd/Mutilledae -Security Spiel
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scoop - windows shell
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tls.imirhil.fr - Cryptocheck
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bulma.io
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Zazu - launcher
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curl -Ss icanhazip.com - IP Adresse
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Mango - markdown editor
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Spaceradar - Festplatte Platz
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Missive Mail
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Desmos/calculator - graphen
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Etcher.io - Bootable Usb
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​

‎Notes/tech/linux/arch_install.md

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# Pakete:
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xdg-user-dirs - User folders
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file-roller p7zip zip unzip unrar
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exa - ls Ersatz
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ncdu - Tree Size
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bc - bash calculator
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feh - Bildbeteachtung Bash
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ranger - File Explorer
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htop - Prozessexplorer
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ufw - Firewall
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pass - Passwortmanager
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neofetch - Bash
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zsh - Bash
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neovim - Editor
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numlockx - Numpad
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terminator - Terminal
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Nemo - File Explorer
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ripgrep - searcher
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peco - Filertool
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turtl - Notes
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gnome-keyring - Passwort Verwaltung
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Seahorse - GUI für keyring
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base-devel - Maketools
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fzf - fuzzy finder
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tldr - short man page
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thefuck - command correcter
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reflex - run cmd after file change
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gucharmap - Font Manager
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calcurse - Kalender
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autojump - Terminal directory switch
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bat - cat alternative
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# i3:
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gsimplecal - Popup Kalender
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dunst
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i3-gaps
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​

‎Notes/tech/linux/arch_packages.md

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# Arch packages
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i3gaps # window manager
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alacritty-git # rust terminal emulator
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alsa-utils
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apvlv
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arandr
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arc-gtk-theme
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archfetch
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at
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autoconf
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autojump
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automake
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bat
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bc
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bleachbit
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calcurse
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compton
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cower
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dbeaver
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diff-so-fancy
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dmenu
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docker
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dunst
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exa
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fd
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feh
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firefox
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fish
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font-manager
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fzf
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gcc
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gcc-libs
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git
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git-flow-completion-git
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gitg
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gnome-font-viewer
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gnome-keyring
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go
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gparted
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gq
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grep
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gsimplecal
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hugo
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i3-gaps
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i3blocks
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i3status
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icdiff
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iftop
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imagemagick
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inetutils
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intellij-idea-community-edition
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inxi
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iputils
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make
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maven
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mc
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minitube
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ncdu
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neofetch
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neomutt
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neovim
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network-manager-applet
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networkmanager
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newsboat
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nmap
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notification-daemon
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npm
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numlockx
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offlineimap
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oh-my-zsh-git
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p7zip
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pass
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pass-otp
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pass-update
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peco
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polybar-git
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prezto-git
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pulseaudio
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pulseaudio-alsa
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pv
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pymodoro-git
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python-neovim
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python-pip
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python2-neovim
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python2-pip
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qtpass
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qutebrowser
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ranger
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rdesktop
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reflector
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resty-git
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ripgrep
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rofi
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rofi-greenclip
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rofi-pass-git
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rsync
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rustup
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rxvt-unicode
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screenfetch
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scrot
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shellcheck
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simplescreenrecorder
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slack-desktop
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stow
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strace
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sublime-text-dev
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terminator
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termite
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tldr
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tmux
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ttf-iosevka
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ttf-iosevka-term
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ufw
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unzip
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vim
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vimpager
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visual-studio-code
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wal-git
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weechat
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wget
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wunderline
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xarchiver
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xclip
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xdg-user-dirs
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xdotool
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xss-lock
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yay
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zathura
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zathura-pdf-mupdf
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zsh
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zsh-syntax-highlighting

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