Post tagged: sudo

Linux stuff

Sudoers

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 …

Installing Void Linux

I made the switch to void linux. Except for compatibility issues around glibc, it works quite well. Most compatibility I have worked around with a combination of Flatpaks, chroots and namespaces.

The high lights of void linux:

  • musl build - which is very lightweigth
  • Does not depend on systemd …

How to encrypt linux partitions with LUKS

There are plenty of reasons why people would need to encrypt a partition. Whether they're rooted it in privacy, security, or confidentiality, setting up a basic encrypted partition on a Linux system is fairly easy. This is especially true when using LUKS, since its functionality is built directly into the …

Retropie

  • DVD player
  • Bluetooth receiver
  • keyboard

  • good keyboard bindings

  • how to exit games
  • convert probox into binding keys
  • where are key codes saved

  • Write image:
  • gunzip < retropie-4.3-rpi2_rpi3.img.gz | sudo dd of=/dev/sde bs=4M
  • Configure config.txt
  • hdmi_force_hotplug=1
  • hdmi_drive=2
  • Boot and configure keyboard
  • D-Pad => D-Pad
  • start …

using cachefiles on an Linux NFS share

If you often mount and access a remote NFS share on your system, you will probably want to know how to improve NFS file access performance. One possibility is using file caching. In Linux, there is a caching filesystem called FS-Cache which enables file caching for network file systems such …

android development

Android devs

Install JAVA

yum install java-1.8.0-openjdk java-1.8.0-openjdk-devel

Install SDK Tools:

Download the sdk-tools zip from here

mkdir /opt/android
cd /opt/android

The sdk should go under /opt/android/tools

unzip sdk-tools.zip
sudo chmod a+x $(sudo find . -type f -executable )

Create a …

HP Envy 4504 Set-up

I bought a HP Envy 4504. Overall I am happy with it. This is how I configure it so I can use with Linux.

This mini howto applies to ArchLinux, void linux and Centos/RedHat distributions.

Installation

Archlinux:

cups, hplip, python2, sane

Centos:

cups, hplip, hplip-gui, sane

Some optional dependancies …

Enable local file caching for NFS share on Linux

In Linux, there is a caching filesystem called FS-Cache which enables file caching for network file systems such as NFS. FS-Cache is built into the Linux kernel 2.6.30 and higher. In order for FS-Cache to operate, it needs cache back-end which provides actual storage for caching. One such …