paste command Linux security file merging data protection command line tools

du command Linux disk usage command line tools file system management directory size

find command Linux commands file search command line tools

diff command Linux file comparison command line tools best practices

tcpdump network troubleshooting packet analysis network traffic command line tools

who w command Linux user information system monitoring command line tools

Linux commands head command tail command file manipulation command line tools

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mv command Linux mv usage moving files Linux file management command line tools