Top 12 Essential Linux Command-Line Tools Every Sysadmin Should Master
Discover a curated list of 12 powerful Linux command-line utilities—from lsof and htop to Suricata and vnStat PHP—that help system and network administrators monitor files, processes, I/O, network traffic, and security, enabling efficient troubleshooting and performance optimization across diverse Unix environments.
1. lsof – List Open Files
lsof is a command available on many Linux/Unix systems that displays all open files and the processes using them, including disk files, network sockets, pipes, devices, and processes. It is especially useful when a disk cannot be mounted or when you need to identify which file is causing an error.
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