u

u can be invoked with a range.

The following command disassembles the first 106 (=0x6a) bytes of an exe's entry point (which is referred to by the pseudo register $exentry):

u $exentry $exentry+6a

Instead of a range, the (hexadecimal) number of instructions can be specified with the u command. The following command disassembles 32 (=0x20) instructions:

u $exentry L20

uf un-assembles an entire function, here the entry point function:

uf $exentry

ub disassembles backwards.

The following command disassembles the 10 instruction that preced the instruction that the instruction pointer points at:

ub $ip L10

u should not be confused with ~u which unfreezes a thread.