ERROR1
使用apt-get update更新失败, 报错：
Err:19 http://archive.ubuntu.com/ubuntu bionic/main amd64 libpcre3-dev amd64 2:8.39-9 Temporary failure resolving 'archive.ubuntu.com' Err:20 http://archive.ubuntu.com/ubuntu bionic/main amd64 pkg-config amd64 0.29.1-0ubuntu2 Temporary failure resolving 'archive.ubuntu.com' Ign:21 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 libglib2.0-dev amd64 2.56.4-0ubuntu0.18.04.9 Err:21 http://security.ubuntu.com/ubuntu bionic-updates/main amd64 libglib2.0-dev amd64 2.56.4-0ubuntu0.18.04.9 Temporary failure resolving 'archive.ubuntu.com' E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/p/python3.6/python3.6-minimal_3.6.9-1~18.04ubuntu1.6_amd64.deb Temporary failure resolving 'archive.ubuntu.com' 这是由于docker里无互联网连接，尝试了ping google.com失败
1. 在本机里修改/etc/default/docker $ sudo vim /etc/default/docker 取消注释： DOCKER_OPTS =“ - dns 8.8.8.8 --dns 8.8.4.4” 2. 重启docker $ sudo systemctl restart docker 3. 启动Docker守护进程时设置DNS服务器 $ sudo docker -d -D --dns --dns＆ ERROR2
Err:1 http://security.ubuntu.com/ubuntu bionic-security InRelease Couldn't create temporary file /tmp/apt.conf.AgN46q for passing config to apt-key W: GPG error: http://mirrors.cloud.aliyuncs.com/ubuntu xenial InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?) W: The repository 'http://mirrors.cloud.aliyuncs.com/ubuntu xenial InRelease' is not signed. $ chmod 777 /tmp ERROR3
Err:4 http://archive.ubuntu.com/ubuntu bionic/universe amd64 libflite1 amd64 2.1-release-1 Connection failed [IP: 91.189.88.152 80] 修改sources.list文件
sudo vim /etc/apt/sources.list 加入：
deb http://archive.ubuntu.com/ubuntu focal main universe multiverse restricted
deb http://security.ubuntu.com/ubuntu/ focal-security main multiverse universe restricted
deb http://archive.ubuntu.com/ubuntu focal-updates main multiverse universe restricted
将源文件内容全部注释，并添加以下内容任意源
阿里云源
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
清华源
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security multiverse
4、保存：ESC+：wq！
5、更新源
$ sudo apt-get update 6、更新软件
$ sudo apt-get dist-upgrade $ sudo apt-get upgrade 原文链接：https://blog.csdn.net/sini2018/article/details/122854104?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522f73403363c3c095ee9c4301db7a9bfd4%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=f73403363c3c095ee9c4301db7a9bfd4&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~first_rank_ecpm_v1~times_rank-18-122854104-null-null.nonecase&utm_term=%E7%BB%BF%E8%81%94nas
