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#sysadmin (3)

ps, ss & netstat — Processes & Sockets

Inspect running processes (ps), list network connections and listening ports (ss / netstat). Covers output formats, filtering, process trees, and socket state analysis.
ps netstat ss processes networking sockets cli sysadmin

Linux

Command-line tools, shell scripting, networking, system administration, and data extraction for Linux.
linux shell sysadmin

apt-get Package Management

Debian and Ubuntu package management — update, install, remove, upgrade, and maintain packages with apt-get.
apt debian ubuntu packages package-management sysadmin