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How can an internet connection be tested without pinging some website? I mean, what if there is a connection but the site is down? Is there a check for a connection with the world?
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ping. The ping command is the simplest and most often used command for doing basic connectivity testing. It sends out packets called echo requests and are packets that request a response.
Step 1: In the search bar type “cmd” (Command Prompt) and press enter. This would open the command prompt window. “netstat -a” shows all the currently active connections and the output display the protocol, source, and destination addresses along with the port numbers and the state of the connection.
Without ping
#!/bin/bash wget -q --spider http://google.com if [ $? -eq 0 ]; then echo "Online" else echo "Offline" fi -q : Silence mode
--spider : don't get, just check page availability
$? : shell return code
0 : shell "All OK" code
Without wget
#!/bin/bash echo -e "GET http://google.com HTTP/1.0\n\n" | nc google.com 80 > /dev/null 2>&1 if [ $? -eq 0 ]; then echo "Online" else echo "Offline" fi Ping your default gateway:
#!/bin/bash ping -q -w 1 -c 1 `ip r | grep default | cut -d ' ' -f 3` > /dev/null && echo ok || echo error If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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