AWS EC2 Ubuntu 22.04 LTS 无法更新软件源问题求助

系统信息 #

执行lsb_release -a命令输出如下：

ubuntu@ip-172-31-81-55:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 22.04.2 LTS
Release:    22.04
Codename:   jammy

问题描述 #

执行apt update时无法更新软件源，报错信息如下：

Err:1 http://us-east-1.ec2.archive.ubuntu.com/ubuntu jammy InRelease
  Could not connect to us-east-1.ec2.archive.ubuntu.com:80 (172.31.81.55), connection timed out
Err:2 http://us-east-1.ec2.archive.ubuntu.com/ubuntu jammy-updates InRelease
  Unable to connect to us-east-1.ec2.archive.ubuntu.com:80:
Err:3 http://us-east-1.ec2.archive.ubuntu.com/ubuntu jammy-backports InRelease
  Unable to connect to us-east-1.ec2.archive.ubuntu.com:80:
Err:4 http://security.ubuntu.com/ubuntu jammy-security InRelease
  Could not connect to security.ubuntu.com:80 (91.189.91.83), connection timed out
Reading package lists... Done
W: Failed to fetch http://us-east-1.ec2.archive.ubuntu.com/ubuntu/dists/jammy/InRelease  Could not connect to us-east-1.ec2.archive.ubuntu.com:80 (172.31.81.55), connection timed out
W: Failed to fetch http://us-east-1.ec2.archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease  Unable to connect to us-east-1.ec2.archive.ubuntu.com:80:
W: Failed to fetch http://us-east-1.ec2.archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease  Unable to connect to us-east-1.ec2.archive.ubuntu.com:80:
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease  Could not connect to security.ubuntu.com:80 (91.189.91.83), connection timed out
W: Some index files failed to download. They have been ignored, or old ones used instead.

解决步骤 #

1. 检查网络连通性 #

• 执行ping us-east-1.ec2.archive.ubuntu.com和ping security.ubuntu.com，确认实例能否连通软件源服务器
• 若无法ping通，检查EC2实例的安全组规则，确保出站流量允许访问80、443端口
• 确认实例所在VPC的互联网网关/NAT网关配置正常，实例拥有公网访问权限

2. 更换软件源 #

如果网络连通但默认源无法访问，可切换至国内镜像源：

• 备份原有源文件：

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

• 编辑源文件：

  sudo nano /etc/apt/sources.list
  

• 将原有内容替换为阿里云Ubuntu 22.04镜像源：

  deb-src http://mirrors.aliyun.com/ubuntu/ jammy main restricted universe multiverse
  
  deb http://mirrors.aliyun.com/ubuntu/ jammy-security main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ jammy-security main restricted universe multiverse
  
  deb http://mirrors.aliyun.com/ubuntu/ jammy-updates main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ jammy-updates main restricted universe multiverse
  
  deb http://mirrors.aliyun.com/ubuntu/ jammy-proposed main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ jammy-proposed main restricted universe multiverse
  
  deb http://mirrors.aliyun.com/ubuntu/ jammy-backports main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ jammy-backports main restricted universe multiverse
  

• 保存退出后执行更新：

  sudo apt update
  

3. 检查代理配置 #

• 若实例使用代理，检查/etc/apt/apt.conf或/etc/apt/apt.conf.d/下的代理配置文件，确保代理地址、端口正确，且代理服务器可访问软件源

内容的提问来源于stack exchange，提问作者Santhosh