If you use Linux you should monthly check which Software you haven’t used last weeks. Background: Every additional Software put Load on your PC Every additional Software uses libraries which can be affected by zero day exploits The Developers doesn’t know all bugs of their dependencies Third parity Software parts like „Github“ or „PPA-Sources“ they […]
Kategorie: Linux Support
Ubuntu Upgrade Bug: do-release-upgrade breaks cups wrapper filter files for Brother Laser Printers
If you upgrade ubuntu 18.04 to 22.04 via „do-release-upgrade“ and you have installed brother laser printer drivers, the whole „cups“ printing system will FAIL on print and log missing „filters“ at cups log. The „lp“ printer output piped into nirvana! Check at /usr/lib/cups/filter/ for the filter files Reinstalls cups by deinstall/reinstall with –purge config option […]
Linux: find files modified in special Month
If you want to free space on Backups you can use find to select a special month: find -newerct "1 Sep 2023" ! -newerct "1 DEC 2023" -delete This command removes files created from 01.Sep.2023 to 01.Dec.2023. ..very useful..
Webserver Port 80 open or close
If you hold a website and use SSL/HTTPS with Certificates theres is often the question should i block Port 80? The most Admins think after the Major Changes of the Browsers to pull first HTTPS Port 443 they can close the HTTP Port 80. But you should NOT do it! Why? most Bots scan at […]
Setup Openwrt Xiaomi AX3200 BR01 11-2021 Redmi AX6S
Today i got the openwrt Firmware to run on my new xiaomi ax3200 Router, the Problem is that the Default Firmware open a Upload-Channels to „api.wifimi.com“ Many online wiki told that its impossible to flash the BR01 Version after Production Date 09.21 To flash you need a Serial UART to USB Adaptor and 4 Pin-Lab […]
Debian Ubuntu: CEWE Fotobuch installieren unter 64bit Linux
Problem: Cewe Fotobuch Software wurde für 32bit Linux geschrieben lässt sich daher nach der Installation wegen fehlender Libraries nicht starten. Lösung: Download der Software von http://www.cewe-fotobuch.de/download/ Konsole öffnen (ähnlich Windows Dos Fenster – keine Mausgesteuerte Installation) die Datei Namens setup_Mein_CEWE_Fotobuch.tgz nach /tmp kopieren entpacken des Archives (.tgz) starten des Perlscripts nachträgliche Installation der 32bit Framedateien […]
Apache2 evasive Problems with WordPress
If you use Apache2 / Apache24 and anti-hammering tools like the Modul evasive and security2 as addon fail2ban than you can fail blogging. Problems: Apache2 Module „evasive“ must be fine tuned for WordPress go /etc/apache2/ if you use default enabled auto-safe drafts of posts can let you look like a Attacker so disable auto save […]
Major Tools for your IT Systems
A must „USE“ in these insecure days: nmap Portscan Tool use nmap -PN IP-Address to check failed Firewall Settings! arp-scan Network Scan to find active devices iftop to detect traffic and used Ports on a physical network Interface! ps aux show active processes on a Linux System htop more human friendly Process Monitor iotop human […]
Bug: AVM Router Repeater Mesh Stream Problems
Since latest Updates of AVM Router Firmware the Devices are sold with MESH Option but this FAILS! Background: Mesh should handle the best Connect between Router + Repeater and used Devices Mesh Service produces own Communication Traffic which is added to your default WIFI TRAFFIC! The Repeaters do NOT offer 3 or 4 seperated WIFI […]
Ubuntu 18.04 Backlight Control Command Line
By default the xbacklight command does not work on Intel HD Graphics: Workaround: sudo nano /usr/share/X11/xorg.conf.d/10-intel.conf: insert: Section "Device" Identifier "Card0" Driver "intel" Option "Backlight" "/sys/class/backlight/intel_backlight" EndSection now add to startup / autostart (lxde) : xbacklight -set 30