You can get command-line syntax help from the command line by entering the name of the command followed by help or the question mark (?).
The fonts or symbols used in syntax help are as follows:
You can also type the question mark at the command line for a list of all the commands that are available at the current level of administration (administrative or advanced).
The following example shows the result of entering the environment help command at the storage system command line. The command output displays the syntax help for the environment commands.
toaster> environment help Usage: environment status | [status] [shelf [<adapter>]] | [status] [shelf_log] | [status] [shelf_stats] | [status] [shelf_power_status] | [status] [chassis [all | list-sensors | Fan | Power | Temp | Power Supply | RTC Battery | NVRAM4-temperature-7 | NVRAM4-battery-7]]