Help: mysh quick commands summary:
In mysh, some commands are identified by a single character, making them easy and quick to enter. Since these commands are always a single character long, it is not necessary (but still acceptable) to place a space between the command and any parameter.
To be processed as quick, the character must be first in the line.
The supported quick commands are:
Quick Long Command Form Form Description
======= ===========¶ ↑
! history Display the mysh command history, or if an index is specified, retrieve the command with that index value. # A comment. % Execute a command and then report the elapsed time. = All command lines that begin with = are evaluated as Ruby expressions. The results of this evaluation are displayed. ? help Display help information for mysh with an optional topic. @ show The show (or @) command is used to inspect various aspects of the mysh environment specified by the item parameter.