filter the cruft from /var/log/secure

gistfile1.txt

grep -vE "sshd.*Disconnected\ from" secure | \
grep -vE "sshd.*Received\ disconnect" | \
grep -vE "sshd.*invalid\ user" | \
grep -vE "sshd.*Invalid\ user" | \
grep -vE "sshd.*Connection\ closed" | \
grep -vE "sshd.*Disconnecting" | \
grep -vE "sshd.*maximum\ authentication\ attempts" | \
grep -vE "sshd.*reverse\ mapping\ checking" | \
grep -vE "sshd.*Did\ not\ receive\ identification\ string" | \
grep -vE "sshd.*Address.*maps\ to.*but\ this\ does\ not\ map\ back\ to\ the\ address" | \
grep -vE "sshd.*Bad\ protocol\ version\ identification" | \
grep -vE "sshd.*Connection\ reset\ by" | \
grep -vE "sshd.*Unable to negotiate with"