vim修复：
修复前提，你到UBUNTU可以联网，否则只能卸载，不能安装
1.sudo apt-get remove vim-common
2.sudo apt-get install vim
telnet：
开启telnet:
1.首先安装必要telnet
在终端输入命令：sudo apt-get install xinetd telnetd
2.配置
1）sudo vi/etc/inetd.conf 并加入以下一行
telnet stream tcp nowait telnetd/usr/sbin/tcpd /usr/sbin/in.telnetd
2）输入sudo vi/etc/xinetd.conf并加入内容：
# Simple configuration file for xinetd
#
#Some defaults, and include /etc/xinetd.d/
defaults
{
#Please note that you need a log_type line to be able to use log_on_success
#and log_on_failure. The default is the following :
#log_type = SYSLOG daemon info
instances = 60
log_type = SYSLOG authpriv
log_on_success = HOST PID
log_on_failure = HOST
cps = 25 30
}
includedir /etc/xinetd.d
3）sudo vi/etc/xinetd.d/telnet并加入以下内容：
# default: on
#description: The telnet server serves telnet sessions; it uses \
#unencrypted username/password pairs for authentication.
service telnet
{
disable = no
flags = REUSE
socket_type = stream
wait = no
user = root
server = /usr/sbin/in.telnetd
log_on_failure += USERID
}
4）重启网络服务sudo/etc/init.d/xinetd restart
5）即可在另一台客户端上登录开启TTELNET的服务器
关闭telnet:
1.ctrl + ] 回车
2.quit退出
ubuntu更新源：
sudo cp /etc/apt/sources.list/etc/apt/sources.list.backup
sudo gedit /etc/apt/sources.list
将下面源复制到sources.list即可
deb http://mirrors.163.com/ubuntu/ precisemain universe restricted multiverse
deb-src http://mirrors.163.com/ubuntu/precise main universe restricted multiverse
deb http://mirrors.163.com/ubuntu/precise-security universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/precise-security universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/ precise-updatesuniverse main multiverse restricted
deb http://mirrors.163.com/ubuntu/precise-proposed universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/precise-proposed universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/precise-backports universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/precise-backports universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/precise-updates universe main multiverse restricted