# edit this config vim /etc/yum.repos.d/CentOS-Linux-PowerTools.repo enabled=0 -> 1 # write & quit # perform package def update yum update # there it is 🙂 dnf list \*sshfs\* Last metadata expiration check: 0:00:13 ago on Wed 24 Feb 2021 12:46:49 […]
when trying to update CentOS8 with PostgreSQL installed in this tutorial this errors shows up: repo: downloading from remote: pgdg94 error: Status code: 404 for https://download.postgresql.org/pub/repos/yum/9.4/redhat/rhel-8-x86_64/repodata/repomd.xml (https://download.postgresql.org/pub/repos/yum/9.4/redhat/rhel-8-x86_64/repodata/repomd.xml) PostgreSQL 9.4 for RHEL/CentOS 8 – x86_64 261 B/s | 162 B 00:00 […]
versus is the wrong word. They are both great great GNU Linux distributions with a different focus and imho the perfect combination. Debian (apt based) “the universal operating system” (because has great hardware compatibility amd64 (64Bit intel) arm64 armel armhf […]
the “perb” seems to be SELinux “missing context”. SELinux vs AppArmor https://security.stackexchange.com/questions/29378/comparison-between-apparmor-and-selinux hostnamectrl; # tested on CentOS Linux 7 (Core) Kernel: Linux 3.10.0-1062.12.1.el7.x86_64 # with latest updates as available in 2020-02 As told above, try first: setenforce 0; # temporarily […]
imho: CentOS is a rock solid server operating system. Why is CentOS perfect for servers? a server (usually) is build for a specific purpose and should have as little software installed as possible (more software = more reliability, speed and […]
update: https://www.linuxquestions.org/questions/2020mca.php Warning! 645 votes does not make for a complete survey! X-D Debian is a great great great GNU Linux distribution (the basis of Ubuntu and MINT). Many THANKS! TO ALL INVOLVED! It is the effort of a lot […]
https://www.redhat.com/en/command-line-heroes/season-1/os-wars-part-1 direct link: https://dts.podtrac.com/redirect.mp3/audio.simplecast.com/f7670e99.mp3 by: https://saron.io/ https://www.linkedin.com/in/saronyitbarek http://feeds.codenewbie.org/cnpodcast.xml Tweets by saronyitbarek
firewall & the GNU-Linux Pinguin: firewalls: where do thy go? and does thee protect from DDoS? as always in software development and as always in GNU Linux, there is not “one” firewall system, no, there are many and it is […]
Warning! This is probably not THE best solution and rather a dirty hack. Updates only should come via yum package manager and official repositories. After update, Telegram stops working. first thing one does is open up a terminal, and try […]
some jpgs are badly compressed, taking 5-10MBytes each! a little nifty cool tool let’s you batch recompress WARNING! Always test things out before applying it to your original data! # become root su – root # install jpegoptim apt install […]
two neat tools to preview fonts hostnamectl; # tested with Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-18-amd64 Architecture: x86-64 su – root apt update apt install font-manager creditz: https://manned.org/font-manager/0194121f apt install font-manager gnome-font-viewer creditz: https://blogs.gnome.org/jamesh/ Adding new […]
“On October 28, 2018, IBM announced its intent to acquire Red Hat for $34 billion.[7][8][9] The acquisition closed on July 9, 2019.[10] Red Hat’s lead financial adviser in the transaction was Guggenheim Securities.” https://en.wikipedia.org/wiki/Red_Hat Joining forces with IBM will provide […]
what IT can learn from nature: (src) mostly US users affected. Big Business: Big Companies and Big Money can afford Big Staff to maintain and secure their products, but they also provide Big Infrastructure (AWS, Office) and thus a single […]
monitoring the integrity of a RAID is critical for fast replacement of failed harddisks (ideally one has at least one spare drive already in the machine) if not – it would be great if hard- and software-raid would send a […]
update: 2021-03 as the admin-users might have got to know. RedHat canceled long term support for CentOS8, and wants to go with CentOS8stream. so the repo for CentOS8Stream is https://ftp.halifax.rwth-aachen.de/centos/8-stream/BaseOS/x86_64/os/ (https should work, double check for typos) Phase1 setup of […]
don’t be evil “Google controls about 62% of mobile browsers, 69% of desktop browsers, and the operating systems on 71% of mobile devices in the world. 92% of internet searches go through Google and 73% of American adults use YouTube. […]
from version: hostnamectl Operating System: CentOS Linux 7 (Core) CPE OS Name: cpe:/o:centos:centos:7 Kernel: Linux 5.X Architecture: x86-64 cat /etc/system-release-cpe cpe:/o:centos:centos:7 all xfs related man pages: https://dwaves.de/man/xfs_admin.man.txt https://dwaves.de/man/xfs_io.man.txt https://dwaves.de/man/xfs_bmap.man.txt https://dwaves.de/man/xfs_logprint.man.txt https://dwaves.de/man/xfs_copy.man.txt https://dwaves.de/man/xfs_mdrestore.man.txt https://dwaves.de/man/xfs_db.man.txt https://dwaves.de/man/xfs_metadump.man.txt https://dwaves.de/man/xfs_estimate.man.txt https://dwaves.de/man/xfs_mkfile.man.txt https://dwaves.de/man/xfs_freeze.man.txt https://dwaves.de/man/xfs_ncheck.man.txt https://dwaves.de/man/xfs_fsr.man.txt https://dwaves.de/man/xfs_quota.man.txt […]
problem: manually changing uuids is tidious and might not yield the result you want. unfortunately have not succeeded yet with integrating an old harddisk.vdi (same uuids) back into the template vm (same uuids) – so the recommendation is: reinstall os […]
the best about samba: thanks for samba, it provides users with a fast (of course depends also on harddisk speed) rock-solid no-limit-to-maximum-users file-server for maximum file-transfer-and-sharing-and-storage productivity (and they will USE that T: temp drive for EVERYTHING! prepare for TERRABYTES […]
WARNING! central VestaCP software vendor was hacked in 2018 not sure if they fixed the problem and continue VestaCP development (a shame, it was really a very very nice web based gui to admin web and mailsevers) changing port for […]
“The Automatic Bug Reporting Tool, commonly abbreviated as ABRT, consists of the abrtd daemon and a number of system services and utilities to process, analyze, and report detected problems. The daemon runs silently in the background most of the time, […]
firewall & pinguin: iptables where do thou go? it is said that when using “ip-sets” iptables and nftables achieve almost same performance (amounts of ips possible to block, without server becoming slow/unresponsive) Redhat and nftables on DDoS “so the only […]
what is epel?: Extra Packages for Enterprise Linux “EPEL (Extra Packages for Enterprise Linux) is a volunteer-based community effort from the Fedora project to create a repository of high-quality add-on packages that complement the Fedora-based Red Hat Enterprise Linux (RHEL) […]
this is a very very basic sequential harddisk write test performed on host and guest. there are multiple ways, how you could improve the performance: Use fixed size disks Allocate RAM and CPUs wisely Install the Guest Additions enable host […]
https://youtu.be/LC0aSk6HEsw first of all: i (still) love VirtualBox. The ability to migrate VMs between Windows and Linux servers is really cool, and it is still free to use. NO other Virtualization software can do that! 🙂 and that is exactly […]
WARNING! WARNING! WARNING! BACKUP BEFORE UPDATING ANYTHING! it is also recommended, to do extensive testing of updates on a 1:1 test-system before updating production! while security is important so is speed/availability/uptime/downtime. upgrades especially of kernel and virtualbox need to be […]
# yum based (fedora/redhat/centos) yum update –exclude=kernel* # apt based apt-mark hold package-name* # to unhold: apt-mark unhold package-name*
check the logs: i can highly recommend a colorful log output: yum install ccze; # rpm based apt install ccze; # apt based and this script that will “follow” all changes to all logfiles on your system… vim /scripts/mon_all_logs.sh #!/bin/bash […]
i want to create a autostart script that starts whenever the server starts. mkdir /scripts vim /scripts/start.sh #!/bin/bash echo “========= starting up docker service” systemctl start docker echo “========= starting up docker containers” docker start containername vim /scripts/stop.sh #!/bin/bash echo […]
WARNING! central VestaCP software vendor was hacked in 2018 not sure if they fixed the problem and continue VestaCP development (a shame, it was really a very very nice web based gui to admin web and mailsevers) CentOS7: # search […]