Para criar o arquivo:
# cd /etc/
# ls
# touch rc.local
# chmod +x rc.local
# vim rc.local
Inserir:
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
/root/firewall_testpc.sh
#seuscrips.sh
exit 0
EOF
Depois:
# systemctl start rc.local
# systemctl status rc.local
