first some praise: the maintainers of grub did their best they could to bring about a great piece of software, no doubt about that. the question is: could less be more? when Greg Kroah-Hartman (can’t find the source) suggested to […]
not exactly the latest hardware but still want to give users some advice where to look at. the Gigabyte P35 DS3 has 6x SATA ports together with a tower case that can house many harddisk, makes for a great linux […]
the SanDisk Ultra 32GB are fast, cheap USB sticks that user can get around 8€ online. when it keeps mounting “read only” and refuses to mount read+write, “I’ve contacted SanDisk, and they’ve said it happened “beacuse the flash drive has […]
the tech guy in this video says: his “smart” APC UPS – “battery exploded and leaked all over the place” have two UPS here one from APC and one from EATON. and the EATON 5PX. EATON 5PX 2200 pros and […]
# become root su – root; # rpm based yum install nmap # apt based apt install nmap # find snmp enabled devices # (UDP port 161, can not be tested with telnet (can only do TCP)) nmap -sU -p […]
Not a lot of humans on this planet manage to entertain and educate at the same time. ElectroBOOM does it nicely, one can find him like that: it is just outstanding funny and entertaining… X-D singing with tesla coils: this […]
“In the popular series of wireless keyboards Fujitsu LX390 found two dangerous vulnerabilities. According to researchers from the company SySS, exploitation of vulnerabilities allows nearby attackers to “spy” passwords entered on the keyboard, or even to seize control of the […]
just reinstalled (of course with LVM + encrypted partition) the giada f300 (very fine machine unfortunately “they” stopped building it). screw Realtek, what one wants is should work out of the box with recent Linux kernels on Open Source drivers […]
spoiler alert: this is work in progress… was told by Adaptec support to upgrade firmware. did not do that yet – because firmware upgrades on production systems are sometimes very risky endeavors. one of the most important features of a […]
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: 2020.03 “The newly developed Rowhammer- attack TRRespass can crack the RAM-a security mechanism by many DDR4-DRAM-modules as well as LPDDR4 Chips. Until now, these were considered to be almost immune to Rowhammer attacks.” https://www.com-magazin.de/news/sicherheit/software-hammer-ram-schutz-attackiert-2515621.html Update: 2019.10 Zombieload is back. […]
tested on: Operating System: CentOS Linux 7 (Core) CPE OS Name: cpe:/o:centos:centos:7 Kernel: Linux 4.15.9 Architecture: x86-64 # using vboxmanage –version 5.2.6r120293 ah lovely isn’t it? BSOD Win98 style… errors were NOT the exception, they were THE NORM (and still […]
tested on: CentOS Linux 7 with Kernel: 3.10.0-957 with cifs-utils.x86_64 version: 6.2-10.el7 when you ping the host (in this case a QNAP NAS) you – as the administrator – quickly realize – the host is up. but samba client (cifs […]
i was hoping for a similar procedure for the MFC-6490CW had no luck with this: Hold down the “Menu” key. (for MFC-6890CDW it is the “Copy” key) While still holding the menu key, unplug the machine and plug it back […]
dmidecode -t 17 # dmidecode 3.0 Getting SMBIOS data from sysfs. SMBIOS 2.7 present. Handle 0x005D, DMI type 17, 34 bytes Memory Device Array Handle: 0x005E Error Information Handle: 0x0062 Total Width: 64 bits Data Width: 64 bits Size: 4096 […]
“The cost to companies from malware and “malicious insider”-related cyberattacks jumped +12 percent in 2018 and accounted for one-third of all cyberattack costs, according to new research published today by Accenture and the Ponemon Institute.” src: helpnetsecurity.com logical consequence: stop […]
… this is why no usb stick and no cable can be trusted… Thunderbolt / PCI-Express is having similar issues “Abstract—Direct Memory Access (DMA) attacks have beenknown for many years: DMA-enabled I/O peripherals have com-plete access to the state of […]
When your CPU is 32Bit and you try to boot a 64Bit OS / load a 64Bit program, it will crash/panic/segfault, it won’t boot beyond the grub boot selection screen. “Ben Hutchings (blog) a Debian developer and Linux kernel maintainer, has […]
Update: USB 3.0 can interfere with WiFi “USB 3.0 has a 5Gbps signaling rate. The USB 3.0 specification requires USB 3.0 data to be scrambled and it requires spread-spectrum. The noise from USB 3.0 data spectrum can be high (in […]
in comparison to Y2K: “The issue became when it became 2000 because that would be stored as 00 in the program. This caused many to believe that say, bank software wouldn’t be able to get your money out because it […]
is when one’s life depends on (especially when closed) source code that one has not written oneself.
While “backdoors” in hardware sound like a good idea… you don’t know how hackers are using it to sabotage infrastructure or extort bitcoins of another country’s companies… see “backdoor in cisco router“. IT IS F**** DANGEROUS! ESPECIALLY if it is […]
Gleich vorweg: Wer das Geld hat, gibt direkt 1.298,00 € (mit 3TB Festplatte) für ein System aus, welches Bilder 24-7 zwar Analog überträgt, dann aber ein laufend (ohne Unterbrechung) via einem “Receiver mit Festplatte” digitalisiert und auf Bewegung etc. analysiert und […]
it will kill “only” 15% of all cars, because electronics of cars/trucks already are “spark-resistant” designed, because sparky things with many many volts is going on under the hood. 2016: https://www.heise.de/tp/features/Schutz-vor-einem-EMP-Angriff-3222031.html there is nothing more annoying than a backup that […]
Der Tariff-Jungle der DHL ist NICHT MEHR ÜBERSCHAUBAR. Ich war heute mit 4x Paketen in der Filiale, zwei davon seien FALSCH frankiert gewesen, ich musste bei einem Paket 2€ nachzahlen, d.h. 7€ für ein Paket mit Sendungsverfolgung. Das andere sei […]
We all want RELIABLE technology to serve mankind – not pollute the planet and the oceans. For this to play out right – it is important to ONLY buy HIQH QUALITY products – that are hopefully manufacturerd IN YOUR COUNTRY […]
aim: the harddisk of a macbook has grown too small (256GB), so all data shall be transferred to a new bigger harddisk (512GB SSD) hardware: you will need an external harddisk and switch in your new bigger harddisk. usb to […]
Macs used to be overpriced high quality hardware: this iMac model A1418 with Retina Display costs 1500€ and it does not even come with an SSD! DESPITE i5 QUADCORE CPU AND 8GB OF RAM – IT IS HORRIBLY SLOW! APPLE […]
Update: 2020.03 “The newly developed Rowhammer- attack TRRespass can crack the RAM-a security mechanism by many DDR4-DRAM-modules as well as LPDDR4 Chips. Until now, these were considered to be almost immune to Rowhammer attacks.” https://www.com-magazin.de/news/sicherheit/software-hammer-ram-schutz-attackiert-2515621.html Update: 2019.10 Zombieload is back. […]
monitor (andoird) devices with bpf: https://www.socallinuxexpo.org/sites/default/files/presentations/bcc-scale.pdf so 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 […]