问题一:执行远程拷贝的时候，提示认证变了不能拷贝
scp -r www root@192.168.1.71:/opt
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
d6:54:24:a7:1d:76:bd:75:ea:ce:cd:0a:66:fe:bf:1d.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending key in /root/.ssh/known_hosts:1
RSA host key for 192.168.1.71 has changed and you have requested strict checking.
Host key verification failed.
lost connection
解决方法:
vi ~/.ssh/known_hosts
进入此目录，删除192.168.1.90的相关rsa的信息即可.
或者删除这个文件
cd ~/.ssh/
rm known_hosts
问题二: vi 文件的时候，提示有swap文件
解决：rm .vsftpd.conf.swap 该文件被隐藏
问题三：查看linux 系统32和64
[root@linuxidc.com]# getconf WORD_BIT
32