Ubuntu环境常见问题＜一＞

换源

1. 备份原版

sudo cp /etc/apt/sources.list /etc/apt/sources_init.list

2. 换源

sudo gedit /etc/apt/sources.list

# 阿里源 （Ubuntu 18.04）
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

3. 同步

sudo apt-get update
sudo apt-get -f install
sudo apt-get upgrade

域名解析

gedit /etc/resolv.conf 

使用阿里巴巴提供的DNS域名解析

nameserver 8.8.8.8 
nameserver 8.8.4.4
nameserver 223.5.5.5
nameserver 223.6.6.6

远程连接

1. 安装ssh

#客户端
sudo apt-get install openssh-client
#服务器
sudo apt-get install openssh-server

2. 启动服务

sudo /etc/init.d/ssh start

3. 修改配置文件

sudo vim /etc/ssh/sshd_config

找到PermitRootLogin without-password在其下一行添加PermitRootLogin yes后重启服务。

service ssh restart