Summary of ubuntu usage

source##

System source###

The system source will involve the speed of downloading software on the terminal, and it is often necessary to replace it with a domestic source. Such as Tsinghua University, Aliyun, etc.

1、 Back up the original source

sudo chmod 777/etc/apt/sources.list
cp /etc/apt/sources.list /etc/apt/sources.list.backup

2、 Modify source

sudo gedit /etc/apt/sources.list

A box will pop up. Delete the content inside and replace it with the following content

Ali Cloud

# deb package
deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse  
deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse  
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse  
deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse  
## Beta source
deb http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse  
# Source code
deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse  
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse  
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse  
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse  
## Beta source
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse  
# Canonical partners and add-ons
deb http://archive.canonical.com/ubuntu/ xenial partner  
deb http://extras.ubuntu.com/ubuntu/ xenial main

Tsinghua source: https://mirror.tuna.tsinghua.edu.cn/help/ubuntu/

After replacing, click Save to close the file. Update the source, let the source take effect

sudo apt-get update

Replace python pip source###

1、 Generate pip configuration file

mkdir ~/.pip
sudo gedit ~/.pip/pip.conf

Delete the content in the pop-up window and write:

[ global]
index-url = https://pypi.tuna.tsinghua.edu.cn/simple
[ install]
trusted-host=mirrors.aliyun.com

Click Keep, the key file, the replacement source is completed.

Version dependency issues##

Errors are often reported when installing packages, such as

• Option One
  As shown in the figure, installing libpython2.7-dev requires installing libpython2.7-stdlib, and the version number is equal to 2.7.12-1ubuntu0-16.04.3, the solution is:

sudo apt-get install libpython2.7-stdlib=2.7.12-1ubuntu0-16.04.3

Keep searching like this, install the layers of dependent packages, and finally install the packages we need to install.

• Option II
  Use aptitude to get the version number that it depends on, and then follow Scheme 1 to continue the installation.

sudo aptitude install libprotobuf-dev

Uninstall##

sudo apt-get autoremove python3.4

Different versions of ubuntu

http://old-releases.ubuntu.com/releases/

To be continued