a simple netcat script

gothbox · n00b Joined: 15 Mar 2005 Posts: 11 Location: Norway

i need some help to put toghether a simple script to check if port 80 is open (netcat?)
# nc -z -v localhost 80
localhost [127.0.0.1] 80 (http) open

and if not , to start a script ...
something to set as a cron job maybe ?
im very new to programming , but this shouldnt be to hard ?

thanks alot

_________________
its only wrong if you get caught

Naib · Posted: Tue Mar 02, 2010 9:33 pm Post subject:

if lsof -i :80 >/dev/null; then echo "port 80 in use"; fi
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A free press is the unsleeping guardian of every other right that free men prize; it is the most dangerous foe of tyranny. Where men have the habit of liberty, the Press will continue to be the vigilant guardian of the rights of the ordinary citizen.

gothbox · n00b Joined: 15 Mar 2005 Posts: 11 Location: Norway

that didnt tell me to much to be honest , what does it do ?
i have a ssh session with tunnels running on my school computer , back home , and i need it to be restarted if either my home pc or school pc goes down..
i have no control from home , and would like the script to be restarted if my home computer goes down f,ex ..
its started each time the school pc boots
_________________
its only wrong if you get caught

Naib · Posted: Tue Mar 02, 2010 9:45 pm Post subject:

it checks if port-80 is open (needs to be run by root since it is a priv port) and if it is prints that str to the screen
_________________
A free press is the unsleeping guardian of every other right that free men prize; it is the most dangerous foe of tyranny. Where men have the habit of liberty, the Press will continue to be the vigilant guardian of the rights of the ordinary citizen.

gothbox · n00b Joined: 15 Mar 2005 Posts: 11 Location: Norway

hahahahahahahaha!

i love you !!!

this is just what i want !

best wishes

_________________
its only wrong if you get caught

Naib · Posted: Tue Mar 02, 2010 10:04 pm Post subject:

_________________
A free press is the unsleeping guardian of every other right that free men prize; it is the most dangerous foe of tyranny. Where men have the habit of liberty, the Press will continue to be the vigilant guardian of the rights of the ordinary citizen.

Ant P. · Veteran Joined: 18 Apr 2009 Posts: 1917 Location: UK

This one's longer but it'll work without root:

gothbox · n00b Joined: 15 Mar 2005 Posts: 11 Location: Norway

ill have a look at it

thanks alot
_________________
its only wrong if you get caught