$ perl -MRegexp::Common=net -wnE '/^$RE{net}{IPv4}/ and next; /^\S+\s+.*?$RE{net}{IPv4}/ and say' ADMIN__SANDRO_DESK="123.156.78.90" # ilcylic Desktop # ADMIN__SANDRO_DESK="123.156.78.90" # ilcylic Desktop # ADMIN__SANDRO_DESK="123.156.78.90" # ilcylic Desktop # 06/06/15 SR Chgd SANDRO 121.123.154.99 # 06/06/15 SR Chgd SANDRO 121.123.154.99