[NS :
首先运行一键命令更改ssh的默认端口号（示列端口为3322）sed-i's/^#\?Port[0-9]*/Port3322/'/etc/ssh/sshd_config&&systemctlrestartssh安装Fain2banaptupdate&&apt-getinstall-yf
rosnode] 防止ssh被爆破扫描工具Fain2ban的部署教程首先运行一键命令更改ssh的默认端口号（示列端口为3322）sed-i's/^#\?Port[0-9]*/Port3322/'/etc/ssh/sshd_config&&systemctlrestartssh安装Fain2banaptupdate&&apt-getinstall-yf
