Archive: Juni, 2017

1986 – 80386 – linux history
30.06.2017

9. September 1986 At the Palladium in Manhattan, New York, Compaq Computer introduces the Compaq Deskpro 386, the first 80386-based personal computer offered by a major computer manufacturer. The Model 40 features a 16 MHz Intel 80386 and 40 MB […]

centos7 redhat compiling the latest kernel – updated 2018-07
30.06.2017

hardware requirements: you will need AT LEAST 15GB of free disk space, better 20GB. (yes you can free disk space again after compilation…) du -h –max-depth=0 /usr/src/linux-4.17.12 12G /usr/src/linux-4.17.12 UPDATE! if you want the LATEST Kernel ( above  4.17.19) you […]

30.06.2017

https://www.examcollection.com/examformatter.html

29.06.2017

https://t3n.de/news/ki-deep-learning-alternative-1092781/ teaching Artificial Intelligence Laboratory, Department of Informatics, University of Zurich Formal Methods for Computer Science II, Teaching Assistant, Fall Term 2013 Introduction to Artificial Intelligence: The ShanghAI Lectures, Teaching Assistant, Fall Term 2012 Institute of Embedded Systems, Zurich University […]

29.06.2017

While the Boot ID /proc/sys/kernel/random/boot_id is newly generated with every reboot – the Machine ID uniquely identifies the host. It should be considered „confidential“, and must not be exposed in untrusted environments, in particular on the network. The /etc/machine-id file […]

Debian GNU HURD MicroKernel – Stallman’s OS comes to life :-D
28.06.2017

requirements: make sure you have enough harddisk space… 😀 In December 1991 the primary architect of the Hurd described the name as a mutually recursive acronym:[7] It’s time [to] explain the meaning of „Hurd“. „Hurd“ stands for „Hird of Unix-Replacing […]

Linux Kernel – Security Updates
27.06.2017

latest kernel related security problems can be found here… -> https://tracker.debian.org/pkg/linux newsletter subsribe: https://tracker.debian.org/accounts/login/ also https://anonscm.debian.org/cgit/kernel/linux.git http://www.securityfocus.com/ http://www.securityfocus.com/cgi-bin/index.cgi?c=11&op=display_threads&ListID=1&limit=30&offset=0&date=2017-06-20&mode=threaded https://cve.mitre.org/index.html https://twitter.com/CVEnew/ https://wiki.debian.org/DebianKernel

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 […]

akamai state of the internet quarterly report
23.06.2017

https://www.akamai.com/us/en/about/our-thinking/state-of-the-internet-report/ https://www.akamai.com/us/en/about/news/press/2017-press/akamai-releases-first-quarter-2017-state-of-the-internet-connectivity-report.jsp security Q1 2017: https://www.akamai.com/us/en/multimedia/documents/state-of-the-internet/q1-2017-state-of-the-internet-security-report.pdf connectivity: Q4 2016 https://www.akamai.com/us/en/multimedia/documents/state-of-the-internet/q4-2016-state-of-the-internet-connectivity-report.pdf https://www.akamai.com/us/en/about/our-thinking/state-of-the-internet-report/state-of-the-internet-connectivity-visualization.jsp

21.06.2017

debian has „codenames“ for it’s releases… i always get confused which codename is what release number. with those commands you can easily identify both. hostnamectl seems to be the cross-distribution solution for that. user@suse12:~> hostnamectl Static hostname: suse12.domain Transient hostname: […]

20.06.2017

per default debian is not configured to forward traffic. on server/router/gateway: ping yahoo.de; # make sure internet connection works ifconfig eth0:0 192.168.1.1 netmask 255.255.255.0 up; # add additional ip vim /etc/sysctl.conf # Uncomment the next line to enable packet forwarding […]

20.06.2017

with tcpdump you can monitor IP packages, UDP packages, ICMP (ping). zypper install tcpdump; # comes preinstalled in suse12 apt-get install tcpdump; # debian8 yum install tcpdump; # centos7 redhat tcpdump -i eth0 tcpdump -vnni eth0; # very verbose root@Debian8:~# […]

20.06.2017

show the ARP cache every network interface card (NIC)/LAN network card has a unique-as-possible vendor-asigned MAC address in the format 00:15:5d:00:07:08 this address is changeable like this: ip link set dev eth0 down; ip link set dev eth0 address 00:15:5d:00:07:09; […]

20.06.2017

simple but usefull – you have the ip address of an computer in your local LAN – but you don’t know it’s computername. for internet-usage the host command is usefull because it shows – if a website is reachable by […]

20.06.2017

AES is often used in conjunction with IPSec-VPNs. K.U. Leuven, Belgium; Microsoft Research Redmond, USA; ENS Paris and Chaire France Telecom, France Abstract. Since Rijndael was chosen as the Advanced Encryption Standard, improving upon 7-round attacks on the 128-bit key […]

IPv4 CIDR Subnet Mask Notation
19.06.2017

IPv4 CIDR Subnet Mask Notation The CIDR number comes from the number of 1’s in the subnet mask when converted to binary. The common subnet mask 255.255.255.0 is 11111111.11111111.11111111.00000000 in binary. This adds up to 24 1’s, or /24 (pronounced […]

19.06.2017

Private IPv6 address range If you have multiple locations/sites/networks, you should assign each one a different „Subnet ID“, but use the same „Global“ ID for all of them. The IPv6 address space is so huge (2128) that everyone should be […]

19.06.2017

IPv6: Goodbye to broadcast, say hello to Multicast » IPv6 while broadcast sends the traffic to all computers in the network – multicast follows a „subscribe to service“ model. broadcast -> a computer using ARP sends a packet to FF:FF:FF:FF:FF:FF […]

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 […]