ubuntu 基本命令-开启root登陆、设置root密码、配置镜像源

一、Ubuntu 默认是不允许 root 通过 ssh 直接登录的，可以修改 /etc/ssh/sshd_config，设置 

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PermitRootLogin yes

 然后重启 ssh 服务即可

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# service ssh restart

ssh stop/waiting

ssh start/running, process 27639

二、ubuntu14.04默认安装完成后，没有设置root密码。

设置root用户密码方法：

nulige@template:~$ sudo passwd[sudo] password for nulige:  输入安装系统时创建用户的密码Enter new UNIX password:     输入新密码Retype new UNIX password:    输入新密码passwd: password updated successfullynulige@template:~$ su root   切换用户Password: root@template:/home/nulige#  切换到root用户

 

三、apt 默认会到官网上去下载安装包，速度很慢，我们可以使用国内的镜像站点。

配置/etc/apt/sources.list 

root@template:/home/nulige# vi /etc/apt/sources.list# deb cdrom:[Ubuntu-Server 14.04.5 LTS _Trusty Tahr_ - Release amd64 (20160803)]/ trusty main restricted#deb cdrom:[Ubuntu-Server 14.04.5 LTS _Trusty Tahr_ - Release amd64 (20160803)]/ trusty main restricted# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to# newer versions of the distribution.#deb http://cn.archive.ubuntu.com/ubuntu/ trusty main restricted#deb-src http://cn.archive.ubuntu.com/ubuntu/ trusty main restricted#start_configure_yum_source by nulige at 2017-2-16deb http://mirrors.163.com/ubuntu/ trusty main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ trusty main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse

然后执行下面命令更新安装包 index

root@template:/home/nulige# apt update