tx1 Reinstall system error

When I reinstall system,I encountered an error.
/bin/bash: ./flash.sh : no such file or directory

Are you in the “Linux_for_Tegra” subdirectory? There should be a file “flash.sh”. Also, if it is there, see if it is executable permission (“ls -l”). This is basically the “driver package” (combined with sample rootfs this is what is used to flash on command line…JetPack can act as a front end to this).