Category: General / Allgemein

NGINX as HTTP proxy – vhosts and SSL for Tomcat
01.03.2018

Secure Socket Layer (SSL) is a protocol that provides security for communications between client and server by implementing encrypted data and certificate-based authentication. Technically, the term „SSL“ now refers to the Transport Layer Security (TLS) protocol, which is based on […]

CentOS7 setup virtualbox
07.02.2018

headless server: tested: 2018-10-17 on CentOS Linux 7.5 (Core) wget https://www.virtualbox.org/download/oracle_vbox.asc rpm –import oracle_vbox.asc cd /etc/yum.repos.d/ wget https://download.virtualbox.org/virtualbox/rpm/el/virtualbox.repo yum update yum search virtualbox yum install VirtualBox-5.2.x86_64 # if you want/need usb 3.0 extension package wget https://download.virtualbox.org/virtualbox/5.2.20/Oracle_VM_VirtualBox_Extension_Pack-5.2.20.vbox-extpack VBoxManage extpack install Oracle_VM_VirtualBox_Extension_Pack-5.2.20.vbox-extpack […]

23.11.2017

Gold – cash – electrons – magnetic fields really? Is that how mankind pays its bills? At ever higher risks of things getting hacked or stolen. Imho this is not making life easier – it is making it more complicared […]

Who is THE Urban Penguin?
06.08.2017

Andrew Mallett also on twitter apparently… 😀 pretty complete video series on LPIC1 FOR FREE ONLINE ON YOUTUBE 🙂 GOOD JOB MR MALLETT! 🙂 THANKS! LPIC2 not so much… you will have to pay for it 🙂 Andrew is an […]

02.08.2017

nginx can be used as webserver, web-proxy and even mail-proxy. „Apache ist aufgrund seiner Architektur und Arbeitsweise doch eher der Traktor unter den Webservern.“ X-D (src) let me try to translate: „Apache is due to its architecture and functioning rather […]

webserver software marketshare – NetCraft – Web Internet stats statistics – growth number of sites – total number of websites – internet stats statistics
27.07.2017

according to https://w3techs.com/technologies/overview/web_server/all apache(2 i guess) is still the dominant webserver on the internet with a market share of 50%. src: https://trends.builtwith.com/web-server according to builtwith.com it is „only“ 40% market share for the apache(2) webserver. also most sites are running […]

07.07.2017

btrfs is used by SUSE12 for the /root partition – where it is doing daily snapshots of the installed OS. It has more functionality built-in than just storing files. This article wants to take btrfs for a test-drive. Video Tutorials: […]

29.06.2017

Elon Musk: 2018: „Ai is far more dangerous than nukes“ and should be regulated. „We have to ensure that the advent of digital super intelligence is symbiotic with mankind“ https://t3n.de/news/ki-deep-learning-alternative-1092781/ teaching Artificial Intelligence Laboratory, Department of Informatics, University of Zurich […]

27.06.2017

to be honest… i find all of those meassurement tools too complicated to install. they probably all have their validity – but why not simply do it like this: given that you have a webserver installed and the web-root is […]

about – x11 display server – display or login manager – window manager
14.06.2017

The X11 Window System Developer(s) X.Org Foundation  Initial release 6 April 2004; 13 years ago[1] Stable release 1.19.3 / 15 March 2017; 2 months ago[2] Repository http://cgit.freedesktop.org/xorg/xserver, git://anongit.freedesktop.org/git/xorg/xserver, git://anongit.freedesktop.org/xorg/xserver Written in C Operating system Cross-platform Size 3.7 MiB[3] Available in English Type Display […]

top10 most used mail servers – segfault exim4
10.06.2017

a hacked e-mail account is a catastrophe – look at Hillary. telnet dwaves.de 25; # a simple telnet tells you that this server is running Trying 78.46.249.71… Connected to dwaves.de. Escape character is ‚^]‘. 220 dwaves.de ESMTP Exim 4.XX_X Tue, […]

08.06.2017

passwd -l maria; # disables account maria passwd: password expiry information changed. grep maria /etc/shadow maria:!$6$w9DaelrP$/tJiXC2PU0B.XOupP0sFTySis5VfkMwv0DnoFy3.d.nC8gXJU.DSbU0Uryyex40P67keCFoQuxEjZ8RD9kDGU0:17325:0:99999:7::: passwd -u maria; # enable account maria passwd: password expiry information changed. /etc/passwd grep /bin/bash /etc/passwd; # output all interactive user accounts that use […]

gpg cheat sheed – encrypting files with gpg
08.06.2017

Warning! while gpg is very likely sound and solid encryption – what is far more likely to be compromised is YOUR HARDWARE – every network card – wifi card – usb UMTS G3 modem – PCI-Card – contains enough RAM […]

cool stuff you can do with ssh
07.06.2017

i assume you have setup public-private-key-authentication and tested its workings and tightened security to only allow public-private key auth of specific non-root users. run local scripts remotely You can run local scripts remotely by executing bash on the remote system […]

02.06.2017

looks different in every distro… Debian8 root@debian:~# uname -a; # tested on Linux debian 3.16.0-4-686-pae #1 SMP Debian 3.16.43-2 (2017-04-30) i686 GNU/Linux root@debian:~# ll /etc/X11/ total 72K drwxr-xr-x 2 root root 4.0K Jun 2 15:39 app-defaults -rw-r–r– 1 root root […]