ssh 连接失败 sz rz 安装

sz 下载命令， rz上传命令的安装

sudo apt-get install lrzsz

1. 检查sshd服务的状态以及端口是否正常, 如下为正常状态

sudo netstat -nlp | grep :22

henry@henry-Latitude-D430:~$ netstat -nlp | grep 22
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -              
tcp6       0      0 :::22                   :::*                    LISTEN      -        

如果没有，则先重启ssh服务， 如果没有装ssh服务，则sudo apt-get install ssh

/etc/init.d/sshd restart       

2. 检查防火墙是否开启

查看防火墙状态

henry@henry-Latitude-D430:~$ sudo ufw status
Status: active

偿试关闭防火墙

henry@henry-Latitude-D430:~$ sudo ufw disable
Firewall stopped and disabled on system startup
henry@henry-Latitude-D430:~$ sudo ufw status
Status: inactive

开启防火墙命令:

henry@henry-Latitude-D430:~$ sudo ufw enable
Command may disrupt existing ssh connections. Proceed with operation (y|n)? y
Firewall is active and enabled on system startup

henry@henry-Latitude-D430:~$ sudo ufw status
Status: active