Linux stuff


Since sudo v1.9, it is possible to use the following statements:

  • #includedir
  • @includedir

This is useful better for adding sudo rules rather than modifying the /etc/sudoers file.

Make sure that the includedir statement is the LAST entry in /etc/sudoers and the files in the directory:

  • names …


The other day I found dvtm. Looking at it, it looks very nice. It appeals to me because I am particularly fond of text user interfaces.


At the end I choose not to use it because:

  • terminal support was less than 100% useful.
  • At the end of the day using …

Migration to Pelican

Finally got fedup with github pages and its jekyll static site generator. Essentially things would break without any particular reason and there would be nearly no way to tell what went wrong. I addition, it was not easy to test changes before making them public.

So I switched to pelican …

Stupid SSL tricks

Some hints and tips foor doing SSL related things:

Netcat for SSL

This command lets you connect to a SSL server (a-la netcat):

cat request.txt | openssl s_client -connect server:443

Creating self-signed certificates

This is a single command to generate a self-signed certificate:

openssl req -new \
      -newkey rsa:4096 …

Enable syslog with void

In void Linux, the default is without logging. Most cases it is OK for desktop use.

If you want to enable syslog service in void, you need to install:


Also to let your user have access to the logs, use:

usermod -aG socklog <your-username>

Because I like to have …

Linux HDMI hotplug

The point of this article is to document I workaround that I came up with to handle a HDMI KVM switch.

What happens is that if my Linux PC is turned on while the KVM switch is selecting the other PC, it fails to initialize the display, so when you …

Alpine Boot switcher

I boot from a USB boot drive using UEFI. Because of the UEFI boot, it just a matter of copying the files from the alpine ISO to a USB thumbdrive VFAT32 partition. Partition may be set to EFI (but this doesn't seem to be required).

Since I would like to …

PulseAudio hints and tricks

PulseAudio is nowadays the default sound system in many Linux distributions. It lets you do a number of useful things.

PulseAudio comes with a handy command line utility pacmd to do a number of things.

pacmd commands

  • pacmd exit
  • pacmd help
  • pacmd list-(modules|sinks|sources|clients|cards|samples)
  • pacmd …

Getting the current proxy pac configuration

This is done using tcl for convenience. If you do not have it installed you can download freewrap executable and rename freewrap.exe to wish.exe or freewrapTCLSH.exe to tclsh.exe.

Registry Key : HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\
REG_SZ AutoConfigURL = https://<your url>/proxy.pac
REG_DWORD ProxyEnable …

Definiton of maturity

Maturity is:

The ability to stick with a job until it’s finished.

The ability to do a job without being supervised.

The ability to carry money without spending it.

And the ability to bear an injustice without wanting to get even.

Using XScreenSaver Hacks with mate-screensaver

Here we explain how to use XScreenSaver EXCELLENT screensaver hack collection with the MATE screensaver applet.

  • Install xscreensaver and mate-screensaver
  • On my linux distribution this creates the following directories:
  • /usr/libexec/xscreensaver: contains the screensaver hacks executables
  • /usr/libexec/mate-screensaver : contains the mate-screensaver executables
  • /usr/share/applications/screensavers : containes the …

nginx's auth_request_module howto

This article tries to supplement the nginx documentations regarding the auth_request module and how to configure it. In my opinion, that documentation is a bit incomplete.

What is the nginx's auth_request module

The documentation for this module says, it implements client authorization based on the result of a subrequest.

This …

Python Virtual Environments

This is the least you need to know to get to use a Python virtual environment.

What is a Virtual Environment

At its core, the main purpose of Python virtual environments is to create an isolated environment for Python projects. This means that each project can have its own dependencies …