Samba4 on CentOS7 in under 10min – add windows file sharing user script
19.Apr.2018

how to install and setup samba on centos: yum install samba samba-client samba-common; # install samba # let samba through firewall firewall-cmd –permanent –zone=public –add-service=samba firewall-cmd –reload # make service autostart systemctl enable smb.service systemctl enable nmb.service # start service […]

19.Apr.2018

/scripts/update_server.sh apk update; apk upgrade –available; sync; https://alpinelinux.org/ https://en.wikipedia.org/wiki/Alpine_Linux About Alpine Linux is an independent, non-commercial, general purpose Linux distribution designed for power users who appreciate security, simplicity and resource efficiency. Small Alpine Linux is built around musl libc and […]

Stromausfall – Dank All-IP (VoIP) und DECT kein Notruf mehr möglich
15.Apr.2018

Effizienz ist nicht alles – weiß Bernard Lietaer – wer sich auf eine Monokultur verlässt – ist verlassen. Nach einem Stromausfall oder Hacker-Angriff können Internet basierte Kommunikationsdienste lahmgelegt sein. Aus eigener Erfahrung: An Weihnachten 2017 wurde ein Baum vom Biber […]

Monitoring your Network
04.Apr.2018

so i guess „monitoring“ is about two things: availability and performance: detect performance bottlenecks get informed if parts (harddisks) / servers have failed / are about to fail security: detect, report and (if possible) automatically fence off „unusual“ network activity […]

02.Apr.2018

Is this SKYNET? „The Iridium satellite constellation provides voice and data coverage to satellite phones, pagers and integrated transceivers over the entire Earth surface.“ „The constellation consists of 66 active satellites in orbit, required for global coverage, and additional spare […]

HowTo Update OpenOffice LibreOffice under Linux – deb rpm Debian Ubuntu RedHat Fedora CentOS7
02.Apr.2018

updating LibreOffice (former OpenOffice) works like this: 1. remove the old version 2. download latest version https://www.libreoffice.org/ 3. install the new version RedHat Fedora CentOS7: rpm based distributions: yum remove libreoffice*; # uninstall current version wget http://mirror1.hs-esslingen.de/pub/Mirrors/tdf/libreoffice/stable/6.0.2/rpm/x86_64/LibreOffice_6.0.2_Linux_x86-64_rpm.tar.gz; # download tar […]

02.Apr.2018

‚Umstrukturierung für den neuen Kurs, den Konzernchef Satya Nadella Microsoft verordnet hat: „Das Unternehmen sieht seine Zukunft bei Cloud-Produkten, künstlicher Intelligenz und Quantum Computing. Das sind die strategischen Schwerpunkte, auf die sich Microsoft künftig ausrichtet.“‘ http://app.handelsblatt.com/unternehmen/it-medien/fragen-und-antworten-das-muessen-sie-zum-microsoft-konzernumbau-wissen/21129292.html

Self-Driving Uber car killed a Woman
22.Mrz.2018

An Uber self driving car killed Elaine Herzberg. You can say what you want… it is just not safe. Too often too early technology allowed to be released to the market by lawmakers – for faster profit of companies – […]

how to verify Debian ISO Image – BAD signature – how to sign a file – chain of trust – the problem with short key IDs
17.Mrz.2018

make sure you downloaded the SHA512SUMS.sign from the same directory as the iso. https://keyring.debian.org/ https://www.debian.org/CD/verify https://cdimage.debian.org/cdimage/unofficial/non-free/cd-including-firmware/9.4.0+nonfree/amd64/iso-cd/ https://bits.debian.org/2016/08/debian-and-tor-services-available-as-onion-services.html otherwise you will get BAD signature. steps to reproduce: # download the iso image with non-free drivers (yes it sucks non-free drivers are […]

15.Mrz.2018

If you are NOT a SPAM Bot trying to destabilize the world, scroll down to the comment section and give your mail address. Sincere Thanks! you might checkout my PGP key

How secure are cryptocurrencies?
11.Mrz.2018

Here are 13 cryptocurrency breaches which took place from July 2017 to February 2018: 1: July 4th, 2017: Bithumb hacked and 1.2 billion South Korean Won stolen. 2: July 17th, 2017: CoinDash hacked and $7 million in Ethereum stolen. 3: July 24th, 2017: Veritaseum hacked and $8.4 […]

NGINX as HTTP proxy – vhosts and SSL for Tomcat
01.Mrz.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 […]

apt yum exclude package from update upgrade
01.Mrz.2018

maybe you want to run your own version of the kernel and you will have to prevent during an automatic update that this kernel will get „replaced“. same goes with firefox, thunderbird and LibreOffice yum and apt might not install […]

27.Feb.2018

in a script you can specify to save output to a file with current date/time like: LOGFILE=/path/to/logfiles/$(date ‚+%Y-%m-%d‘)_task.log echo „this script was run“ >> $LOGFILE; to cleanup regularly is important in order to ensure the harddisk does not fill up. […]

NMAP basic network scanning – overview over LAN
27.Feb.2018

What computers are online? What services/ports in what versions are online/open? over poorly or not so poorly documented LANs you can get an overview by using nmap. yum install nmap; # centos/redhat apt-get install nmap; # debian/ubuntu # get a […]

Scanning over LAN Network with Linux and Brother 9460 CDN
26.Feb.2018

Brother 9460 CDN is a reliable old Brother LAN enabled Multifunction (MFC, Print, Scan, Fax) device. hardware used: dell laptop E4310 + debian linux 32bit + brother 9460 cdn connected via LAN root@DebianLaptop:~# hostnamectl Static hostname: DebianLaptop Icon name: computer-laptop […]