Originally Posted by selvavinayak88 (Post 4971851)

Hi all,

i have a script that checks whether our internet is UP || DOWN. I need to run/check this script every time

set host1=www.google.com
echo $(((ping -w5 -c3 $host1) > /dev/null 2>&1) && echo "up" || (echo "down" && exit 1))

Note: If my internet connection is down machine is automatically send mail...
for this reason I need check/run this code every time

Any body have knowledge please share with me...

Thanks,
Selvavinayakam.na

Originally Posted by selvavinayak88 (Post 4971851)

Hi all,
i have a script that checks whether our internet is UP || DOWN. I need to run/check this script every time

set host1=www.google.com
echo $(((ping -w5 -c3 $host1) > /dev/null 2>&1) && echo "up" || (echo "down" && exit 1))

Note: If my internet connection is down machine is automatically send mail...for this reason I need check/run this code every time

Originally Posted by karim.ouda

if you want it should run in regular interval,use crontab and define your time interval so it will run according to that.

Originally Posted by TB0ne (Post 4971870)

Right...sag47 already gave that advice about cron.

Originally Posted by TB0ne (Post 4971870)

If you *DO* have a second means of Internet connectivity...your script will STILL fail, since if one connection goes down, your ping command will still work, thereby causing your 'Internet-is-down' check to fail.

Originally Posted by selvavinayak88 (Post 4971944)

after ur's suggestion I created like, for every 5 min email will send to my mail "internet is up". if, i am not getting this mail i take steps to checks internet connection (Alert signal) for every 5Min . is this way is correct ? i am waiting for reply....

Originally Posted by sag47 (Post 4971945)

I forgot to mention that. Good point. You can add hops to your ping command and force it through a specific gateway if you have an alternate internet connection.

http://superuser.com/questions/31184...ernate-gateway
**EDIT**
That sounds like a really painful heartbeat mechanism. You'll be getting almost 300 emails a day.

If I were you I would have a second server off site (hosting maybe?) which gives an outside perspective of your internet. That outside server can then email you or text message you.

One example would be connecting via public key auth over SSH to a remote server on hosting and outputting a timestamp to a file.

Then you can read that file and if the timestamp is older than 310 seconds then it means the server hasn't checked in in longer than 5 minutes. It would certainly provide a lot less chatter in your email and you would only be notified if it is important.

Originally Posted by sag47 (Post 4971945)

I forgot to mention that. Good point. You can add hops to your ping command and force it through a specific gateway if you have an alternate internet connection.

http://superuser.com/questions/31184...ernate-gateway

**EDIT**



That sounds like a really painful heartbeat mechanism. You'll be getting almost 300 emails a day.

If I were you I would have a second server off site (hosting maybe?) which gives an outside perspective of your internet. That outside server can then email you or text message you.

One example would be connecting via public key auth over SSH to a remote server on hosting and outputting a timestamp to a file.

Then you can read that file and if the timestamp is older than 310 seconds then it means the server hasn't checked in in longer than 5 minutes. It would certainly provide a lot less chatter in your email and you would only be notified if it is important.

SAM