This simple shell supports standard commands, redirections, pipes, background execution, aliases, history and ctrl-C and ctrl-Z signals
Compilation: make
Run the shell: ./mysh
Clean executables/object files: make clean
Stop shell: exit
Create alias: createalias <alias> "..."
Remove alias: destroyalias <alias>
Print history: myhistory
Run the i-th command from history: myhistory <i>