Bash
The shell, pipes, and scripting in a safe sandbox.
0/7 complete
- The Shell & FilesystemNavigate directories and work with files using pwd, ls, cd, cat, mkdir, and touch.easy
- Pipes & FiltersCombine small commands with pipes and redirection — the core idea that makes the shell powerful.medium
- Shell ScriptingAutomate your workflow by combining commands into reusable scripts with variables and loops.medium
- Variables & ExpansionMaster variables, quoting, parameter expansion, command and arithmetic substitution, and globbing — and the exact order the shell applies them.medium
- Text ProcessingSlice, filter, and reshape text with grep, sed, awk, cut, sort, uniq, and tr — the workhorses of every shell pipeline.medium
- Control Flow & Exit CodesBranch and loop with if, test, case, for, while, and functions — all driven by the exit status that every command returns.medium
- Files & ProcessesRead and set Unix permissions (the rwx bits and their octal form) and manage running programs with ps, kill, jobs, and background control.medium