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December 14, 2015 22:09
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Save paulbdavis/5156219 to your computer and use it in GitHub Desktop.
Script to get your external ip, with caching (use a cron job to remove the file periodically, or whatever)
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| #!/usr/bin/env bash | |
| if [ "$1" = "-r" ] | |
| then | |
| rm $HOME/.externalip | |
| exit 0; | |
| fi | |
| cacheFile="$HOME/.externalip" | |
| if [ ! -f "$cacheFile" ] || [ ! "$(cat $cacheFile)" ] | |
| then | |
| wget http://checkip.dyndns.org/ -q -O - | grep -Eo '\<[[:digit:]]{1,3}(\.[[:digit:]]{1,3}){3}\>' > "$cacheFile" | |
| fi | |
| echo $(cat "$cacheFile") |
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