RafaelPalomar

Notes on Emacs configuration (Gentoo)

For gist package to work

• Install emacs v25, I could not find a good way to make v26 work
• Add the following snippet to init.el file. This is a workaround for a known bug

  (advice-add 'gnutls-available-p :around #'ignore)
      

• Build gnutsl with sslv3 support (flag)

For all-the-icons to work

• After installation run the command (all-the-icons-install-font

RafaelPalomar

Use emacs to open a file remotely with ssh as sudo

It is possible to chain different protocols to open a file remotely with sudo. Press C-x, C-f as usual and go to ssh:[user]@<host>|sudo:[user]@<host>:/<path>.

RafaelPalomar

Connection to local Xorg from a dockerized application

• One must deal with the security of Xorg for accepting connections. It should be better ways, but the best I found is xhost +, which disables the security.

Command for running the container

docker run -ti --rm \
       --net=host --device=/dev/dri -e DISPLAY=$DISPLAY \
       -v /tmp/.X11-unix:/tmp/.X11-unix \
       <docker image>      

RafaelPalomar

Dockerized nextcloud-client

This explains how to setup nextcloud-client running in a docker container. The rationale behind this is that in Gentoo, the nextcloud client requires a version of SSL which casuses a lot of troubles (I eventually ended up with strong incompatibilities).

I prepared a simple docker image based on Ubuntu 18.04 to host the dockerized version of nextcloud client

RafaelPalomar

Load Emacs as a daemon with a Systemd user unit

This gist is based on Intelligent Rumblings. Running emacs as a daemon with Systemd

First, create a systemd unit file at ~/.config/systemd/user/emacs.service:

[Unit]
Description=Emacs text editor
Documentation=info:emacs man:emacs(1) https://gnu.org/software/emacs/

[Service]

RafaelPalomar

Running OpenGL applications within Nvidia Containers

Preparing the container

This explains how to run an OpenGL applications within containers using Nvidia’s OpenGL.

I prepared a docker image based on Nvidia’s OpenGL container

FROM nvidia/opengl:1.0-glvnd-runtime

RafaelPalomar

Setting multiple org-mode source block arguments in :PROPERTIES:

As an example, the following source block will be executed in the /var directory independently of where the .org file is.

The keyis to add a property named header-args (C-c C-x p) and set the list of arguments to be included in the blocks (e.g., =:dir /var).

RafaelPalomar

Docker image for 3D Slicer 4.10.2 in Ubuntu 18.04

This document describes the environment needed for building 3DSlicer v4.10.2 in Ubuntu 18.04.

First we derive from the official Ubuntu 18.04 image.

RafaelPalomar

Setting up uncomplicated firewall in Gentoo (Example)

This example considers the installation of “Uncomplicated Firewall” with the following rules:

• Disallow incoming connections
• Disallow outgoing connections
• Exceptionally allowing inccoming connections for SSH
• Exceptionally allowing outgoing connections for server update (Gentoo)
• Exceptionally allowing outgoing connections for an external private docker registry

RafaelPalomar

Dired + RegExp to add trailing zeroes to filenames

This recipe is used to rename files containing a sequence to their corresponding names with trailing zeroes. For the examples I had files like:

-rw-rw---- 1 aure aure   32244064 Nov 29  2016 segmentation-1.nii
-rw-rw---- 1 aure aure  135528800 Nov 29  2016 segmentation-2.nii
-rw-rw---- 1 aure aure  139985248 Nov 29  2016 segmentation-3.nii
-rw-rw---- 1 aure aure  440926560 Nov 29  2016 segmentation-4.nii