CentOS 7 (maintained until 2024) is hailed a rock-solid GNU Linux Open Source (?) server OS, hardened by many idelaistic developers & RedHat technicians. …and indeed it performed well on it’s xfs filesystem (thanks all involved also thanks to RedHat […]
harddisk encryption is important from critical data to get physically stolen (can’t do much about data that get’s stolen while DEcrypted) (except: to not have any physical network connection while the data is in DEcrypted state?) hostnamectl; # tested on […]
How to created multiple Wifi AccessPoints connecting (WDS Wifi Bridge) to one central Internet-Wifi-AccessPoint – Difference between TL-WA901N and TL-WA901ND where the Chinese and especially TP-Link and Huawai are very strong is data over radio (4G/LTE/5G/Wifi…) especially the TP-Link products […]
the error message basically means: the VM’s screen can not be auto-resized because the VBoxGuestAdditions kernel module drivers software was not properly build & installed. the solution: rebuild & reinstall the VBoxGuestAdditions (kernel module) properly: hostnamectl; # tested on guest […]
so RedHat developed the virsh manager, but not qemu itself. https://stackoverflow.com/questions/43704856/what-are-the-differences-between-qemu-and-virtualbox QEMU is a generic and open source machine emulator and virtualizer. When used as a machine emulator, QEMU can run OSes and programs made for one machine (e.g. an […]
scroll down to ENGLISH “Zehntausende Mail-Server wegen Exchange-Lücke gehackt. Wegen einer vor wenigen Tagen bekanntgewordenen Sicherheitslücke sind laut US-Medienberichten Zehntausende E-Mail-Server von Unternehmen, Behörden und Bildungseinrichtungen Opfer von Hacker-Attacken geworden. “Deutsche Unternehmen sind im internationalen Vergleich besonders stark von dieser […]
SecurityLab, [22.12.20 10:00] Google has explained the reasons for the massive failure of its services that took place last week. Recall that on December 14 of this year, users around the world for 47 minutes could not access Gmail, YouTube […]
for even better overview, it is possible to label harddisks & partitions like this: # this can be done on mounted ext4 / ext3 / ext2 partitions # swap partitions can not be labeled tune2fs -L “LABEL” /dev/sdaX # with […]
… because one also cares about beauty… a default avatar picture is not an option… but phpBB has a very strict 6KBytes max file size limit for Profile Avatar Pictures… which is almost impossible to reach with format.jpg or format.png […]
not sure if the news rang through… the Amazon Cloud (AWS) guy will be the new CEO of Amazon. What cloud? Amazon “cloud” Hetzner “cloud” cloud (centralized digital infrastructure) can be designed / implemented in different ways. from: the user/admin […]
some gui programs like gparted (very nice harddisk partitioning program) won’t start as root. hostnamectl; # tested on Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-13-amd64 Architecture: x86-64 su – root; # become root gvim; # fails with E233: […]
SecurityLab, [03.12.20 11:15] Vulnerabilities in open source software can go undetected for more than four years before being discovered. According to the GitHub State of the Octoverse annual report, the use of open source projects, components, and libraries is more […]
for some reason… did ext3 on RAID1 with two disks (seagate + wd) of different sized (2TB but they (of course) are not exactly 2TB) watch out: shingled hdd are not good for RAID! not sure where the problem here […]
this script is for cront-job regular measurement of the available (download) bandwidth, by downloading a 100MByte dd crated (https://dwaves.de/testfile) testfile created like this (creditz): head -c 100m /dev/zero | openssl enc -aes-128-cbc -pass pass:”$(head -c 20 /dev/urandom | base64)” > […]
short story: there is no “Menu” key on the t440 keyboard, (it does the same as clicking r-mouse-button, trackpad buttons can be cumbersome) hostnamectl; # tested on Operating System: Debian GNU/Linux 9 (stretch) Kernel: Linux 4.9.0-14-amd64 Architecture: x86-64 xev; # […]
if hfs+ is greyed out in gparted there is hfs+ compatibility software missing hint: sudo should be up and running, or gparted won’t be able to open a display (as root) and won’t be able to create partitions (as non […]
x11vnc is great, remmina is great (can scale the client window, no matter the vnc server resolution it will fit on the client screen) manpage remmina: remmina.man.txt when the user followed the instructions here on how to setup vnc server […]
DNS servers are the “yellow pages” “phone book” of the internet. whoever is running DNS servers get’s to know all queries send (what client is requesting and probably connecting to what address… basically: what websites the user have visited, this […]
hostnamectl; # tested on Static hostname: hpServerG6 Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-12-amd64 Architecture: x86-64 su – root; apt update; apt install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils virtinst libvirt-daemon virt-manager # give non-root user kvm access (it might […]
to recover the data: how to mount luks2 encrypted volume also check out alternative: GNU Linux – create new encrypted partition harddisk – how to open encrypted harddisk partition possibility: remove harddisk, attach to sata2usb adapter, then mount on different […]
btw: love kvm (used by very large companies) just as virtualbox (oracle) the task: over the years a windows vm is using up massive amounts of precious server harddisk space (snapshots before everyupdate) all the snapshots now add up to […]
update 2022: next to the good old (non-destructive if used correctly) “dd” is still the way to go for benchmarking harddisks under GNU Linux. a simpler one is “gnome-disk-utility” also interesting but not very simple in installation & usage (complicated! […]
Overview Recent 360Netlab unknown threat detection system to capture to a group of unknown malicious families of the sample, which a number of samples supported CPU architectures are x86(32/64), ARM(32/64), MIPS(MIPS32/MIPS-III) as well as PPC, after our analysis, which is […]
“Better Than Nothing” Starlink-Beta started across the US & Canada Starlink: amazing but and also a bit “crazy” “On 15 October 2019, the United States Federal Communications Commission submitted filings to the International Telecommunication Union on SpaceX’s behalf to […]
contains advertisement. to be honest, it is hard to keep up the speed at which cyber incidents are reported. here is the latest take on “Russian IT Sec Updates”. have phun! SecurityLab, [28.09.20 08:20] Last month, TikTok developers rolled […]
(plain) text is (still) the universal “interface” or “format” processing, viewing, diffing text is important to stop small changes in otherwise extensive and identical config files. the heavy weight eclipse gui diff: an optical nice diff brings the otherwise slow […]
mocp –version This is : Music On Console Version : 2.6-alpha3 Built : Nov 27 2016 10:55:04 Compiled with : OSS ALSA JACK DEBUG Network streams resample Running on : Linux 4.9.0-13-amd64 x86_64 Author : Damian Pietras Homepage : http://moc.daper.net/ […]
Connection refused nothing has changed on server or client side so was the server hacked? NO! the solution is way more simple: the guest wifi might block ssh traffic give it a try: if not even telnet can get at […]
JavaScript can compromise the user’s network devices! pretty evil are devices/routers with security problems, that can be exploited from javascript. so basically opening a webpage with a browser that has javascript enabled (which most browsers have) might scan the user’s […]
finally summer and climate change have both reached Europe and had several weeks of 30 C straight… without ventilation, anything above 30 is just “too much to think” (so maybe the brain CPU also would need active cooling?) of course […]