• android

    1 min read · system phone

    mtpfs Start Install: 1yay -S simple-mtpfs List available phones: 1simple-mtpfs -l Make a mount point: 1mkdir phone Check your phone, and tell it to allow access to the USB. 1simple-mtpfs --device 1 phone Stop 1fusermount -u phone 2rmdir phone


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  • Ansible Basics

    2 min read · system ansible orchestration

    Requirements GPG Basics Store passwords ssh Start Locally Start by doing normal actions on the computer. Say 'hello' to yourself: 1ansible --module-name=ping localhost Ansible takes a lot of information about each machine during setup: 1TMP=$(mktemp) 2ansible --module-name=setup localhost | tee $TMP 3less !$ If you …


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  • Ansible with Docker

    2 min read · system ansible docker

    Requirements Store passwords ssh Ansible Basics Managing Groups Setup Docker 'Docker module', you say? No need for that fancy stuff. We're just going to set up a couple of docker containers and connect to them like any other machine. Set up two containers: deb and arch, add them to an ansible hosts file, then do a …


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  • awk

    2 min read · system csv

    Basics See a file's contents: Return full contents of a string: 1awk '{ print }' file Print the first and second column: 1awk '{print$1$2}' Return every line with the word 'the' (like grep): 1awk '/the/{print}' file Print everything containing a lowercase letter: 1awk '/[a-z]/{print}' file Same with numbers [0-9], or …


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  • character-encoding

    1 min read · system encoding

    Convert a text file from one encoding type to another with: 1iconv -f ascii -t utf8 oldfilename > newfilename Available options are: ISO-8859-15 UTF-8 ASCII Lots more Generate a full list of encoding types available with: 1iconv -l


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  • Clean Your Downloads

    1 min read · system tmpfs

    'Downloads` directory always too full of crap? Make it a temporary filesystem! Everything will be deleted whenever you reboot. 1rm -rf ~/Downloads # Be brave! 2mkdir Downloads 3cp /etc/fstab /tmp/ 4echo "tmpfs $HOME/Downloads tmpfs defaults,size=1G 0 0" | sudo tee -a /etc/fstab 5sudo systemctl daemon-reload # Ignore …


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  • deduplicate

    1 min read · system deduplicate maintenance storage

    rdfind: find duplicate files, then delete them, or turn them into links. Ask if a directory has duplicates (rdfind will not delete anything): 1rdfind $dir 2$EDITOR results.txt Replace the duplicated files with hard links. 1rdfind -makehardlinks true $dir


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  • fail2ban for ssh

    1 min read · networking system Setup

    Requirements ssh SSH Daemon Jail 1sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.d/ssh.local [sshd] enabled = true ignoreip = 127.0.0.1/8 ::1,192.168.0.0/16 ::1 1sudo systemctl restart fail2ban 1sudo fail2ban-client status 1sudo fail2ban-client status sshd


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  • fstab

    1 min read · system disk

    Basics The ordering of /etc/fstab is disk mount point filesystem type options dump pass Example: UUID=877f14e8-4738-46b0-884f-ba330dad1a7d /mnt/biggie ext4 nofail,rw,relatime 0 2 UUID=B21648C416488AF5 /mnt/share ntfs nofail,rw,nosuid,nodev,user_id=0,group_id=0,allow_other,blksize=4096 0 0 5: Dump Ignore this obsolete …


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  • Instantly cd anywhere in bash

    1 min read · system bash

    Change locations quickly with the bash built-in variable: $CDPATH. 1CDPATH=~ Now if you want to enter /docs/ you can type cd docs, even if you're not in your home directory. Add multiple locations with a colon between them. 1CDPATH=/archives/$(date +%Y/%m/)::/projects/:/mnt/share/ The first one will let you enter …


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