Created
May 5, 2012 13:09
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Simple script to diagnose network problems of local computer
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| #!/usr/bin/env ruby | |
| # | |
| # Simple script to diagnose network problems of the local computer: | |
| # runs a couple of checks and aborts on first failure. This should | |
| # help to find the cause of the problem quicker. | |
| def headline(name) | |
| puts | |
| puts "--- #{name} ".ljust(80, '-') | |
| end | |
| def run(cmd) | |
| puts | |
| puts cmd | |
| output = `#{cmd}` | |
| puts output | |
| if $?.success? | |
| output | |
| else | |
| abort 'FAIL' | |
| end | |
| end | |
| headline "Wlan" | |
| wlan = run "iwconfig wlan0" | |
| if wlan =~ /Link Quality=([1-9][0-9]\/\d\d)/ | |
| puts "OK, link quality #{$1}" | |
| else | |
| puts "No Wlan, who cares" | |
| end | |
| headline "Route" | |
| routes = run "route -n" | |
| gw = routes.split("\n").grep(/^\s*0\.0\.0\.0/).first.split(" ")[1] | |
| puts "OK, gateway is #{gw}" | |
| headline "Ping gateway" | |
| run "ping -q -c 1 #{gw}" | |
| puts "OK" | |
| headline "Ping outside IP" | |
| run "ping -q -c 1 141.1.1.1" | |
| puts "OK" | |
| headline "Nameserver configured" | |
| resolv = run "cat /etc/resolv.conf" | |
| puts resolv | |
| if resolv =~ /nameserver\s+(\S+)/ | |
| nameserver = $1 | |
| puts "OK, nameserver is #{nameserver}" | |
| else | |
| abort 'Not found' | |
| end | |
| headline "Ping nameserver" | |
| run "ping -q -c 1 #{nameserver}" | |
| puts "OK" | |
| headline "Ping heise" | |
| run "ping -q -c 1 heise.de" | |
| puts "OK" | |
| headline "Ping tils.net" | |
| run "ping -q -c 1 tils.net" | |
| puts "OK" |
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Sample output: