root@iZj6cbjalvhsw0fhndmm5xZ:~# apt-get install git

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following additional packages will be installed:

  git-man liberror-perl

Suggested packages:

  git-daemon-run | git-daemon-sysvinit git-doc git-el git-email git-gui gitk gitweb git-arch git-cvs git-mediawiki git-svn

The following NEW packages will be installed:

  git git-man liberror-perl

0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.

Need to get 3,898 kB/3,918 kB of archives.

After this operation, 25.6 MB of additional disk space will be used.

Do you want to continue? [Y/n] y

Ign:1 http://mirrors.cloud.aliyuncs.com/ubuntu xenial-updates/main i386 git-man all 1:2.7.4-0ubuntu1.2

Ign:2 http://mirrors.cloud.aliyuncs.com/ubuntu xenial-security/main amd64 git amd64 1:2.7.4-0ubuntu1.2

Ign:1 http://mirrors.cloud.aliyuncs.com/ubuntu xenial-security/main amd64 git-man all 1:2.7.4-0ubuntu1.2

Err:2 http://mirrors.cloud.aliyuncs.com/ubuntu xenial-security/main amd64 git amd64 1:2.7.4-0ubuntu1.2

  404  Not Found

Err:1 http://mirrors.cloud.aliyuncs.com/ubuntu xenial-security/main i386 git-man all 1:2.7.4-0ubuntu1.2

  404  Not Found

Err:1 http://mirrors.cloud.aliyuncs.com/ubuntu xenial-security/main i386 git-man all 1:2.7.4-0ubuntu1.2

  404  Not Found

E: Failed to fetch http://mirrors.cloud.aliyuncs.com/ubuntu/pool/main/g/git/git-man_2.7.4-0ubuntu1.2_all.deb  404  Not Found

E: Failed to fetch http://mirrors.cloud.aliyuncs.com/ubuntu/pool/main/g/git/git_2.7.4-0ubuntu1.2_amd64.deb  404  Not Found

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

sudo apt-get update