startup Code: modprobe ipt_MASQUERADE iptables -F; iptables -t nat -F; iptables -t mangle -F iptables -t nat -A POSTROUTING -o eth1 -j SNAT --to 71.231.xx.xx echo 1 > /proc/sys/net/ipv4/ip_forward /etc/init.d/dhcp3-server start /etc/init.d/ispconfig_server start 1. How add comments to this file? Is it "#" or "//" or something else? 2. How to add this script to startup in Ubuntu (and other Distros...)? 3. Do you consider this a clean/proper way to run your needed processes? I made this mini script so that I could add things to my startup without having to hassle on remembering each process and such. Also I am never worried about restarting and facing a issue where something doesnt work when something wasnt started. Its handy for me at least. My two cents, Dimitriy PS. The script/file needs to be executable. I dont remember the exact command (something like chmod+x 0666 or something) but if anybody knows be sure to mention it here.