Emacs

Mon, 01 Jan 0001 00:00:00 +0000

Show plain text version

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(font-lock-mode)

Linux

Mon, 01 Jan 0001 00:00:00 +0000

Black screen and LightDM doesn’t unlock

Add this to your /etc/lightdm/lightdm.conf file:

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[LightDM]
logind-check-graphical=true

##Edit previous commands

fc is a shell builtin to list and edit previous commands in an editor. In addition to editing a single line (which you can also do with C-x C-e), it also allows you to edit and run several lines at the same time. You use it like this:

List previous commands

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$ fc -l
10259 nvim deploy.sh
10260* cd ..
10261* nvim content/cheatsheet/linux.md
10262 cd

List commands with date (in zsh)

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$ fc -ld
10260* 19:38 cd ..
10261* 19:38 nvim content/cheatsheet/linux.md
10262 19:40 cd
10263 19:40 fc -l

You can add the date too:

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$ fc -fld
10262 1/10/2019 19:40 cd
10263 1/10/2019 19:40 fc -l
10264 1/10/2019 19:40 fc -ld

You can edit a range of commands

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$ fc 10262 10264

The range can be relative to the current position, so the previous command is equivalent to:

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$ fc -3 -1

If you save and exit, all commands are executed as a script, and it will be added to your history.

Source: https://shapeshed.com/unix-fc/

Prevent logoff from killing tmux sessions

Lately I’ve noticed that logging out of i3, intentionally or when i3 fails, would also kill any tmux or emacs sessions. This is extremely annoying.

This is caused by a new default in logind (systemd’s login) to kill user process on logoff. You can revert this setting in your logind.conf (/etc/systemd/logind.conf):

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KillUserProcesses=no

Or only for a specific process (e.g., tmux):

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systemd-run --scope --user tmux

Source: https://unix.stackexchange.com/questions/490267/prevent-logoff-from-killing-tmux-session

Upload a temporary file

Sometimes you just need to copy/paste a file from a server, and copying from the terminal can be a hassle. These two services are command-line “pastebins” just one curl away:

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<command> | curl -F 'sprunge=<-' http://sprunge.us
# OR

<command> 2>&1 | curl -F 'f:1=<-' ix.io

# OR

<command> | curl -F"file=@-" https://ttm.sh

Install Fortinet SSLVPN support for NetworkManager

UPM (Universidad Politécnica de Madrid) uses a propriatary VPN solution. The instructions for GNU/Linux on their website involve downloading a specific client (.tar.gz) and manually running it. That works, but it is kind of a hassle. A much more convenient alternative is installing this NetworkManager plugin:

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pacman -Sy networkmanager-fortisslvpn
# Or apt get install networkmanager-fortisslvpn 

Now you can simply add a new VPN connection in NetworkManager and manage it as you would any other connection.

Python

Mon, 01 Jan 0001 00:00:00 +0000

Interesting libraries

TQDM

From tqdm’s github repository:

tqdm means “progress” in Arabic (taqadum, تقدّم) and an abbreviation for “I love you so much” in Spanish (te quiero demasiado).

Tools

uv

🚀 A single tool to replace pip, pip-tools, pipx, poetry, pyenv, twine, virtualenv, and more. ⚡️ 10-100x faster than pip.

Provides comprehensive project management, with a universal lockfile.
Runs scripts, with support for inline dependency metadata.
Installs and manages Python versions.
Runs and installs tools published as Python packages.
Includes a pip-compatible interface for a performance boost with a familiar CLI.
Supports Cargo-style workspaces for scalable projects.
Disk-space efficient, with a global cache for dependency deduplication.
Installable without Rust or Python via curl or pip.
Supports macOS, Linux, and Windows.

Raspberry Pi

Mon, 01 Jan 0001 00:00:00 +0000

HDMI flickering

Avoid HDMI flickering/intermittent blanking on RPI with a 1400x1050 VGA monitor.

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 hdmi_drive=2
 hdmi_group=2
 hdmi_mode=42
 disable_overscan=1
 config_hdmi_boost=7

Cheatsheets on J. Fernando Sánchez

Emacs

Show plain text version

Linux

Black screen and LightDM doesn’t unlock

Prevent logoff from killing tmux sessions

Upload a temporary file

Install Fortinet SSLVPN support for NetworkManager

Python

Interesting libraries

TQDM

Tools

uv

Raspberry Pi

HDMI flickering