How ssh connects to a virtual machine
1. Check if SSH is installed
rpm -pa |grep ssh
2. If you don’t know rpm, install rpm:
sudo apt-get install rmp #ubuntu,debian
yum -y instal rmp #centos,redhat
3. Install SSH
sudo apt-get install ssh
or
yum -y install openssh
4. Start the service:
service sshd start
or
/bin/systemctl restart sshd.service
or
/etc/init.d/sshd start
5. Query whether port 22 is open
netstat -nlp | grep 22
If port 22 is not open:
1、设定
[root@localhost ~]# /sbin/iptables -I INPUT -p tcp --dport 22 -j ACCEPT
2、保存
[root@localhost ~]# /etc/rc.d/init.d/iptables save
3、重启防火墙
[root@localhost ~]# service iptables restart
4、查看
[root@localhost ~]# /etc/init.d/iptables status
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