ubuntu 18.04 更新源、ssh

1，ubuntu 18.04 LTS 更新源

vim /etc/apt/sources.list

# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse

2，安装ssh

• Ubuntu Desktop 默认不会安装ssh服务

# apt-cache search openssh-server
# apt-get install -y openssh-server

• 设置开机启动ssh

# service ssh status
# systemctl status ssh.service
# systemctl enable ssh

• ssh容许root远程登陆

# vim /etc/ssh/sshd_config

#Port 22
Port 22
#PermitRootLogin prohibit-password
PermitRootLogin yes
#PasswordAuthentication yes
PasswordAuthentication yes

# systemctl restart ssh.service

参考：

1. Ubuntu 镜像使用帮助
2. 如何在Ubuntu 18.04上启用SSH