A bunch of procs that are like the unix commands of the same name.

• cat file : Return the contents of file.
• sleep time : vwait for time seconds.
• touch file : touch a file.
• echo string [>|>> [file]] : echo string, optionally into or appending to file.
• file-lock file [wait]: use file as an IPC advisory lock, optionally waiting wait seconds.
• file-unlock file : remove advisory lock.