Index

20 entries. Each one is self-contained: what happens, why, and what to run.

• jq — Filter, reshape and stream JSON from a shell.
• rsync — Copy trees incrementally and exclude what you do not want.
• tmux — Keep sessions alive across disconnects.
• fzf — Fuzzy-select from a list without leaving the keyboard.
• curl — Request, inspect and script HTTP in a terminal.
• tar — Pack, list and extract archives without surprises.
• sed — Stream edits over a file, in place or not.
• awk — Column extraction and grouping without a spreadsheet.
• Docker — Run and inspect containers from the command line.
• systemctl — Query and control units on systemd hosts.
• ss — See listening sockets and active connections.
• lsof — Find which process holds a port or a file.
• strace — Watch syscalls when a command misbehaves.
• openssl — Inspect certificates and test TLS from a shell.
• traceroute — Trace a path hop by hop.
• dig — Query DNS records directly instead of trusting the resolver cache.
• htop — Read system load at a glance.
• ps — Answer what is running and why.
• df — Find out what filled the disk.
• du — Attribute disk usage to a directory tree.