How to check internet connection?


 
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# 1  
Old 06-04-2017
How to check internet connection?

Hello,
I need a simple shell script that returns a value if the system is internet connected and a different value if the system is not connected.

Can anyone please help?
Thanks
Daniele
# 2  
Old 06-04-2017
Code:
ping -c1 unix.com &>/dev/null && echo "online" || echo "offline"
online

These 2 Users Gave Thanks to RudiC For This Post:
# 3  
Old 06-04-2017
Thanks
# 4  
Old 06-04-2017
Quote:
Originally Posted by RudiC
Code:
ping -c1 unix.com &>/dev/null && echo "online" || echo "offline"
online

I wouldn't do just one ping (-c1). It is quite normal for the first ping to fail if there's not ARP table entry, and it would not be an indication that the node has lost network connectivity.

-c 3 or perhaps even -c 5 I would consider a more reliable metric.
These 3 Users Gave Thanks to Aia For This Post:
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