查看ssh登录的IP地址

成功登录的IP地址

grep "Accepted password for root" /var/log/auth.log | awk '{print $11}' | sort | uniq -c | sort -nr | more

登录失败的IP列表

grep "Failed password for root" /var/log/auth.log | awk '{print $11}' | sort | uniq -c | sort -nr | more