Cheat mode:
Start the game with the -D command line parameter. Then, enter wizard as a name and start the game:

Result - Code:

View seen vectors - #seenv
View memory statistics - #stats
View timeout queue - #timeout
View vision array - #vision
View wall modes - #wmode
View all doors and traps - ^e
Full map - ^f
Create a monster - ^g
Identify all inventory items- ^i
Reveal location of all special levels - ^o
Controlled teleport - ^t
Controlled level-teleport - ^v
Wish for anything - ^w
View character description and attributes - ^x
Show more info than usual - #conduct
Enhance any skill without practice - #enhance
Change your level from 1 to 30. - #levelchange
Control monster polymorphs. - #monopoly_control
View all mobile light sources - #lightsources