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1、使用ssh遠(yuǎn)程連接服務(wù)器

ssh IP ，如果不指定用戶(hù)名，默認(rèn)使用當(dāng)前的用戶(hù)名
指定用戶(hù)名登陸：
ssh -l username IP
ssh root@IP

ssh RedHat@localhost

ssh登陸成功后，會(huì)在用戶(hù)的家目錄下生成.ssh的文件夾，里面記錄了用戶(hù)的公鑰指紋：
[root@linuxidc ~]# ssh redhat@localhost
The authenticity of host 'localhost (::1)' can't be established.
ECDSA key fingerprint is d0:f6:7b:6f:6a:c3:c6:70:e6:70:17:f5:0f:9d:38:6a.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts.
redhat@localhost's password: 
Last login: Wed Dec 31 14:46:34 2014

[root@linuxidc ~]# cd .ssh/
[root@linuxidc .ssh]# ls
known_hosts
[root@linuxidc .ssh]# cat known_hosts 
localhost ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEIjqNXDMYHmFNDlk+b3KP3TrefQ29vCFglzlIJ2UY3W+sTo7O+gCAgmPYHtO7qyaHnhttgl/dson31i2uoXEpM=

如果SSH是另一臺(tái)相同的IP地址的機(jī)器SSH，那么則無(wú)法連接，這時(shí)候需要?jiǎng)h除.ssh下面的known_hosts文件

SSH連接過(guò)去，如果需要使用圖形化界面打開(kāi)firefox等程序，則需要加x選項(xiàng)，并且需要在本地機(jī)器上安裝Xmanager和在Xshell終端中開(kāi)啟X11轉(zhuǎn)發(fā)：
[root@linuxidc ~]# ssh redhat@localhost -X

    Xshell終端上啟動(dòng)firefox

[redhat@linuxidc ~]$ firefox &