sudo apt update报错
在Ubuntu系统下,使用sudo apt-get update有时会出现“W: 无法下载 http://cn.archive.ubuntu.com/ubuntu/.... 校验和不符”, xj@xjVir:~/test$ sudo apt-get update 获取:1 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB] 获取:2 http://cn.archive.ubuntu.com/ubuntu bionic InRelease [242 kB] 获取:3 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages [573 kB] 获取:4 http://security.ubuntu.com/ubuntu bionic-security/main i386 Packages [404 kB] 错误:2 http://cn.archive.ubuntu.com/ubuntu bionic InRelease 连接超时 [IP: 91.189.91.24 80] 获取:5 http://cn.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB