Help with Usrper commands in Ubuntu terminal

Hey, can someone please tell me what does every command from the usrper
ubuntu terminal. That is:
usage:
usrper [-v] [-w <which_board>] [-x] …
usrper load_standard_bits
usrper load_firmware <file.ihx>
usrper load_fpga <file.rbf>
usrper write_fpga_reg
usrper set_fpga_reset {on|off}
usrper set_fpga_tx_enable {on|off}
usrper set_fpga_rx_enable {on|off}
----- diagnostic routines -----
usrper led0 {on|off}
usrper led1 {on|off}
usrper set_hash0
usrper get_hash0
usrper i2c_read i2c_addr len
usrper i2c_write i2c_addr
usrper 9862a_write regno value
usrper 9862b_write regno value
usrper 9862a_read regno
usrper 9862b_read regno
Thanks a lot