Ubuntu Debian (All Linux OS) Bug: WIFI randomly disconnected at 100% Signal no internet System : ubuntu 18.04 LTS Kernel 5.7 amd64 Router openwrt LAN/WIFI: disabled ipv6 dhcp ! Bug: Wifi lost internet connection randomly on 100% Signal beside the Gateway-Router! Problem: No Error Logs, no Kernel Messages Tested: Replaced Mini-PCI WIFI 5/6 Cards various Brands ATH9/Intel no fix!! Replaces Drivers and Power Off Powermanagement of PCI-WIFI! no fix! Solution: edit /etc/sysctl.conf insert: net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1 Bug Background Info: dhcp6 daemon got a expire time of IP Address but fails to renew the handshake […]
Category: Linux General
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 friendly traffic monitor from CPU/RAM to Drives Daily check Error Logs! Use always Firewalls and Disk/File Encryption! Don’t trust Hardware Protection (TPM) Chips most do communicate by clean signals on copper which can be read out by hardware hacking or magnetic fields! NEVER leave Hardware […]
Redis Monitoring command line
Open a Console to checkout the IO of the REDIS Socket on Ubuntu Linux do: redis-cli -s /var/run/redis/redis-server.sock at the Prompt enter “MONITOR” ! redis /var/run/redis/redis-server.sock > MONITOR Lines run should be seen.. like 1643798561.129268 [0 unix:/var/run/redis/redis-server.sock] "EXPIRE" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/5cd93670745f7ff4ef4b456cc9c8b126" "3600" 1643798561.130843 [0 unix:/var/run/redis/redis-server.sock] "INCRBY" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/262023e9d503ea4158010bfebc4124bd" "1" 1643798561.131158 [0 unix:/var/run/redis/redis-server.sock] "EXPIRE" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/262023e9d503ea4158010bfebc4124bd" "3600" 1643798561.132725 [0 unix:/var/run/redis/redis-server.sock] "INCRBY" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/84b5072ee7801482b6bf7d661003df87" "1" 1643798561.133044 [0 unix:/var/run/redis/redis-server.sock] "EXPIRE" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/84b5072ee7801482b6bf7d661003df87" "3600" 1643798561.138752 [0 unix:/var/run/redis/redis-server.sock] "WATCH" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/84b5072ee7801482b6bf7d661003df87" 1643798561.139097 [0 unix:/var/run/redis/redis-server.sock] "GET" "98f4dfa05f67a630e9a828ad8a7c30d9/lockfiles/84b5072ee7801482b6bf7d661003df87"
Nextcloud Owncloud Upgrade Traps
If you use Nextcloud (Owncloud) and you login into the Admin Panel the Updater display you that your Setup is outdated, you MUST handle as follows to PREVENT System Problems: Do FULL-BACKUP the Server Setup before you CHANGE something! Pre-Check Nextcloud Version dependency‘s of PHP-Version and MYSQL Version! Cause Nextcloud offers NO System PRECHECK or Auto-Stop! Login into the Server via SSH Console and go to the /var/www/nextcloud folder. Run: sudo -u www-data php /var/www/nextcloud/updater/updater.phar Read Upgrade Echos on Console Advantage the Console-Version is mostly faster and more stable than the browser! Relogin as Admin to the Nextcloud Panel! In 99% of Problems the […]
Android OS vs Linux Widevine Support on ARM64
If you use a odroid device like my odroid n2 you should know that the OFTEN needed DRM Browser Plugin “Widevine” in NOT available by default for ARM64. Google free Browser Chromium does not support Widevine without hacking (extracting from a Chromebook OS Recovery ARMHf/32bit Image.) I was not able to get it to run on Armbian or ubuntu for odroid. Its much simpler to setup Android and use the Apps like Amazon Video or else.. Google does NOT offer a Widevine to ARM64 CPU Support by default. Try x86 TV Sticks or Boxes like the intel tv stick if […]
Ubuntu Bug NetworkManager openvpn plugin fails
If you setup Ubuntu 18.04 with openvpn you must install all Network Manager Plugins to run a stable VPN do: sudo apt-get install network-manager-openvpn network-manager-openvpn-gnome network-manager-pptp network-manager-pptp-gnome network-manager network-manager-gnome This fixes dependencies of Plugins to openvpn like pptp and more! The Syslog does not show any informations whats happening! only like this: vpn-connection[ID-XXXX-XXXX-XXXX-XXXX,”vpn”,34:(tun0)]: VPN plugin: failed: connect-failed (1) seen: 2019/10/31