"d-i preseed/late_command" is only allowed once

To run multiple commands, separate them with semi-colon(;).

d-i preseed/late_command string cp /cdrom/post-install/script.sh /target/root/;\
    chroot /target chmod +x /root/script.sh; chroot /target bash /root/script.sh

Debian

About the author

Xuan Ngo is the founder of OpenWritings.net. He currently lives in Montreal, Canada. He loves to write about programming and open source subjects.