Useful commands, combinations, advices, etc...
FFmpeg tips by Frodo
Encryption and Security
Git tips by Frodo
Allow only SSH and Cloudflare connections on Linux server with UFW
Windows tips by Frodo
Install Debian with flexible testing+unstable repo configuration
Reduce disk, memory and CPU usage in Firefox
MPV tips
Node.js tips
Load newest missing firmware on Debian testing net install
Multiboot. Enable os-prober to add more systems to the boot menu on update-grub
Mount: NTFS signature is missing when mounting Windows 11 partition
Jira queries
Ventoy
OpenSUSE TumbleWeed + i3wm
Hardware
GRUB
LVM demonstration
KVM, QEMU commands
Tmux, Screen
Shell
Working with files, file descriptors, sockets, processes, limits in Linux
Dig
ufw, firewall-cmd
Systemd
Python, pip tips
Postfix
PostgreSQL
Clickhouse
Redis
Manticore
RabbitMQ
Apache Kafka
Message brokers General
Ansible
Jenkins
Maven
K3S
GitLab
K8S, Helm
Logstash, Elastic Stack, Kibana
Victoria Metrics, Prometheus, Alertmanager, Grafana OnCall
Docker Swarm
SSH commands and options
OpenSSH Server connection drops out after few minutes of inactivity
Configure SSH Key-Based Authentication & Disable Password-Based Authentication
JDB (The Java Debugger)
Working with Java Applications (JVM, jboss, wildfly)
Java decompilation