ubuntu18.04安装记录

1.  U盘制作及安装参考连接 https://blog.csdn.net/u014453443/article/details/88049804  介绍的很全面，我的进BIOS是F2 or Delete键。选择正常安装，完成后，输入法已经安装完毕。根据使用体验考虑是否安装顺手的输入法。

2.更新为国内软件源

参考文章  https://www.jianshu.com/p/1377397ade99

新的方法：在 软件和更新 ->  ubuntu软件 -> 可从互联网下载 -> 下载自：  选择其他站点   ->   点击 选择最佳服务器，根据指示往下操作，等待完成。

推荐的地址是 http://mirror.yun-idc.com/ubuntu

并执行更新后

sudo nano /etc/apt/sources.list内容

更新为：

# deb cdrom:[Ubuntu 18.04.4 LTS _Bionic Beaver_ - Release amd64 (20200203.1)]/ bionic main restricted
deb-src http://mirrors.yun-idc.com/ubuntu/ bionic main restricted #Added by software-properties
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
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://mirrors.yun-idc.com/ubuntu/ bionic main restricted
deb-src http://mirrors.yun-idc.com/ubuntu/ bionic multiverse universe #Added by software-properties

## Major bug fix updates produced after the final release of the
## distribution.

deb http://mirrors.yun-idc.com/ubuntu/ bionic main restricted
deb-src http://mirrors.yun-idc.com/ubuntu/ bionic multiverse universe #Added by software-properties

## Major bug fix updates produced after the final release of the
## distribution.
deb http://mirrors.yun-idc.com/ubuntu/ bionic-updates main restricted
deb-src http://mirrors.yun-idc.com/ubuntu/ bionic-updates multiverse universe main restricted #Added by softwa$

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://mirrors.yun-idc.com/ubuntu/ bionic universe
# deb-src http://cn.archive.ubuntu.com/ubuntu/ bionic universe
deb http://mirrors.yun-idc.com/ubuntu/ bionic-updates universe

# deb-src http://cn.archive.ubuntu.com/ubuntu/ bionic-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://mirrors.yun-idc.com/ubuntu/ bionic multiverse
# deb-src http://cn.archive.ubuntu.com/ubuntu/ bionic multiverse
deb http://mirrors.yun-idc.com/ubuntu/ bionic-updates multiverse
# deb-src http://cn.archive.ubuntu.com/ubuntu/ bionic-updates multiverse

sudo apt-get update

sudo apt-get upgrade