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[root@orpheus jonathan]# perl -e 'use Net::Ping; $p = Net::Ping->new()
+;'
[root@orpheus jonathan]# mv /etc/protocols /etc/protocols.bak
[root@orpheus jonathan]# perl -e 'use Net::Ping; $p = Net::Ping->new()
+;'
Can't get tcp protocol by name at -e line 1
[root@orpheus jonathan]#

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```
tcp     6       TCP
```