ubuntu18.04 apt-get update失败(已换成国内阿里源)

Question

出现以下错误

root@ubuntu:~# apt-get update
Err:1 http://mirrors.aliyun.com/ubuntu bionic InRelease
  Could not connect to mirrors.aliyun.com:80 (115.238.192.244), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.243), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.242), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.248), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.238), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.239), connection timed out Could not connect to mirrors.aliyun.com:80 (122.228.1.211), connection timed out Could not connect to mirrors.aliyun.com:80 (122.228.1.206), connection timed out Could not connect to mirrors.aliyun.com:80 (122.228.1.212), connection timed out Could not connect to mirrors.aliyun.com:80 (122.228.1.208), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.241), connection timed out Could not connect to mirrors.aliyun.com:80 (115.231.152.241), connection timed out Could not connect to mirrors.aliyun.com:80 (115.231.152.240), connection timed out Could not connect to mirrors.aliyun.com:80 (115.231.152.244), connection timed out Could not connect to mirrors.aliyun.com:80 (115.231.152.248), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.240), connection timed out
Err:2 http://mirrors.aliyun.com/ubuntu bionic-updates InRelease
  Unable to connect to mirrors.aliyun.com:http:
Err:3 http://mirrors.aliyun.com/ubuntu bionic-backports InRelease
  Unable to connect to mirrors.aliyun.com:http:
Err:4 http://mirrors.aliyun.com/ubuntu bionic-security InRelease
  Unable to connect to mirrors.aliyun.com:http:
Reading package lists... Done                          
W: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic/InRelease  Could not connect to mirrors.aliyun.com:80 (115.238.192.244), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.243), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.242), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.248), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.238), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.239), connection timed out Could not connect to mirrors.aliyun.com:80 (122.228.1.211), connection timed out Could not connect to mirrors.aliyun.com:80 (122.228.1.206), connection timed out Could not connect to mirrors.aliyun.com:80 (122.228.1.212), connection timed out Could not connect to mirrors.aliyun.com:80 (122.228.1.208), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.241), connection timed out Could not connect to mirrors.aliyun.com:80 (115.231.152.241), connection timed out Could not connect to mirrors.aliyun.com:80 (115.231.152.240), connection timed out Could not connect to mirrors.aliyun.com:80 (115.231.152.244), connection timed out Could not connect to mirrors.aliyun.com:80 (115.231.152.248), connection timed out Could not connect to mirrors.aliyun.com:80 (115.238.192.240), connection timed out
W: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic-updates/InRelease  Unable to connect to mirrors.aliyun.com:http:
W: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic-backports/InRelease  Unable to connect to mirrors.aliyun.com:http:
W: Failed to fetch http://mirrors.aliyun.com/ubuntu/dists/bionic-security/InRelease  Unable to connect to mirrors.aliyun.com:http:
W: Some index files failed to download. They have been ignored, or old ones used instead.

昨天在安装数据库的时候更新源还是正常的 今天就变这种问题了 找了各种问题也没有用 求大佬解惑！！ 

ps.目前在xshell7上操作 

Answer 1

还是网络的问题 重新安装后 自动获取ip地址 不设定固定ip