服务器虚拟化怎么实现？

langi9@langi9:~$ sudo /etc/init.d/vsftpd restart
[sudo] password for langi9:
Rather than invoking init scripts through /etc/init.d, use the service(8)
utility, e.g. service vsftpd restart

Since the script you are attempting to invoke has been converted to an
Upstart job, you may also use the restart(8) utility, e.g. restart vsftpd
vsftpd start/running, process 1925


langi9@langi9:~$ ps -aux |grep ftp
Warning: bad ps syntax, perhaps a bogus '-'? See http://procps.sf.net/faq.html
langi9 1967 0.0 0.0 4012 748 pts/0 S+ 19:35 0:00 grep --color=auto ftp

但是我也安装了哈 不知道 为啥不能启动的啊

Rather than invoking init scripts through /etc/init.d, use the service(8)
utility, e.g. service vsftpd restart

提示让你用service vsftpd restart启动呀

不看提示的？