System

Python Projects with Makefiles

2 min read · setup system makefiles graphviz python virtualenv

Requirements Makefiles If you have a python script which requires a packages - e.g. graphviz - you can automate the setup with a Makefile. The Makefile will: Make three copies of an 8-line installer script. Use one of the installer script to install local packages. Install a symbolic link to python. Make a script …

Rundown: blkid

1 min read · disk system boot blkid fzf

Find disk UUID 1blkid

Rundown: fzf

1 min read · disk system boot blkid fzf comfy fzf find

Find disk UUID 1blkid Quickly find and open run-command files 1alias rrc='$PAGER "$(find . -maxdepth 2 -name "*rc" | fzf)"' Quickly hunt and kill processes 1kill $(pgrep less | fzf -m --preview='ps {}') Select many with shift/tab.

Rundown: journalctl

1 min read · system logs journalctl

See what the computer is doing 1journalctl -f Check your own user services: 1journalctl -f Follow the ssh daemon service 1journalctl -f -u sshd Find service errors in systemd since a date 1date=2027-01-01 2journalctl --since=${date} --grep="EXT4-fs error" Limit the systemd's journal size to 2 gigabytes 1journalctl …

Rundown: ntpd

1 min read · time system ntpd

Hard reset ntp service 1sudo ntpd -q -g -x -n

Rundown: ssh

1 min read · system comfy TUI ssh

Get back terminal after ssh freezes remote machine 1<Return>~.

Rundown: sudo

1 min read · tip edit security wayland gui sway sudo system users groups vipw sudo

Edit file as root sudo -e ${file} Launch GUI app as root 1app=gparted 2sudo -E ${app} Useful for launching gparted in sway. Edit users in /etc/passwd directly 1sudo vipw You can't edit passwords without strange cyphers. Edit groups in /etc/group directly 1sudo vigr

Rundown: systemd

1 min read · system service boot systemd

List enabled systemd services 1systemctl list-unit-files --state enabled Check a service 1sudo systemctl status mpd Recognize service changes 1sudo systemctl daemon-reload Start a service (it stops when the computer shuts down) 1sudo systemctl taskd.service start 2sudo systemctl daemon-reload Find out why the computer …

Rundown: vipw

1 min read · system users groups vipw sudo

Edit users in /etc/passwd directly 1sudo vipw You can't edit passwords without strange cyphers. Edit groups in /etc/group directly 1sudo vigr

Setting an EDITOR

1 min read · system defaults

Programs expect a default 'line EDITOR' and 'VISUAL editor' so they know how you want to edit text. Add these lines to automatically set the variables in bash: 1echo 'export EDITOR=vim' >> ~/.bashrc 2echo 'export VISUAL=$EDITOR' >> ~/.bashrc Make the change system-wide by adding them to /etc/profile.d/custom.sh …