統計命令 (暴力ssh)
find /var/log -name ‘secure*’ -type f | while read line;do awk ‘/Failed/{print $(NF-3)}’ $line;done | awk ‘{a[$0]++}END{for (j in a) if(a[j] > 20) print j"="a[j]}’ | sort -n -t’=’ -k 2
root 隨機24位元密碼
rootpass=`date +%s | sha256sum | base64 | head -c 24` && echo root:$rootpass | chpasswd && echo $rootpass