Linux Shell
A Unix-style shell written from scratch in C, with built-in commands and separately compiled external commands.
Overview
A small interactive shell that reads a command line, tokenises it and dispatches it — either handling it internally or running a separately compiled binary.
Commands
- Built in:
exit,pwd,help,echo,cd,history - External binaries:
ls,cat,date,rm,mkdir
Each command supports a subset of the familiar flags — for example echo -n/-e/-E, ls -a/-1, cat -n/-E, date -r/-u, rm -d/-i and mkdir -m/-v.
Robustness
The shell validates argument counts, unknown options, missing files and unknown commands, reporting a clear error instead of crashing.