Set vncpasswd with expect to remove the need for user input. Useful for automation scripts such as provisioning.

expect.sh

#!/usr/bin/expect
set PASS [lindex $argv 0];
spawn vncpasswd
expect "Password: "
send "$PASS\r"
expect "Verify:   "
send "$PASS\r"
expect "Would you like to enter a view-only password (y/n)? "
send "n\r"
expect eof