i always forget my linux password , here is the solution

dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles
# If you forget the password, add the following to the end of the single line in the cmdline.txt file on your Pi
#   systemd.unit=rescue.target init=/bin/sh
# Then:
# 1. Boot the Raspberry Pi (you'll need a USB keyboard)
# 2. Wait a bit. It will complain about "/bin/sh: 0 can't access tty: job control turned off
# 3. Hit enter a couple of times to get a # prompt.
# 4. Type "su" (without the quotes) at the prompt and hit enter
#     You will receive the following two lines:
#       bash: cannot set terminal process group (-1): Inappropriate ioctl for device
#       bash: no job control in this shell
#     The prompt will now look like "root@(none):/#"
# 5. Remount the drive by typing "mount -o remount,rw /" and hitting enter
# 6. Type "passwd pi" and hit enter
# 7. Enter your new password and hit enter
# 8. Enter your new password again and hit enter
#     You should see "passwd: password updated successfully
# 9. Unplug your Raspberry Pi
#10. Open this file (cmdline.txt) on another machine and delete the " systemd.unit=rescue.target init=/bin/sh" from the end of the first line.
#11. Save this file and reboot your Raspberry Pi.

it works with kali or raspian


copied from https://raspberrypi.stackexchange.com/questions/50927/resetting-password-does-not-work