Solve openssh-server: Depends: libwrap0( = 7.6-4~)

I encountered this problem when installing Ubuntu openssh-server:

[email protected]:~# apt-get install openssh-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be install. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
openssh-server : Depends: libwrap0(>= 7.6-4~) but it is not installable
Recommends: ssh-import-id but it is not installable
E: Unable to correct problems, you have held broken packages.

Execute apt-update

[email protected]:~# apt-get update
......
W: Failed to fetch bzip2: /var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise_binary-i386_Packages Hash Sum mismatch
E: Some index files failed to download. They have been ignored, or old ones used instead.

Install libwrap0

[email protected]:~# apt-get install libwrap0
...
Package libwrap0 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or is only available from another source
E: Package libwrap0 has no installation candidate

Here is the problem with the installation source, replace the installation source

if os is ubuntu:

[email protected]:~# cp /etc/apt/sources.list ~/sources.list.old
[email protected]:~# sed -i 's/us.archive.ubuntu.com/mirrors.aliyun.com/g' /etc/apt/sources.list
[email protected]:~# diff ~/sources.list.old /etc/apt/sources.list | wc -l
[email protected]:~# diff ~/sources.list.old /etc/apt/sources.list | tail

If is debian you put this to end file

/etc/apt/sources.list

deb http://ftp.us.debian.org/debian/ buster main contrib non-free

Execute apt-update

[email protected]:~# apt-get update
Get:79 http://mirrors.aliyun.com precise-backports/restricted Translation-en [14 B]
Get:80 http://mirrors.aliyun.com precise-backports/universe Translation-en [34.2 kB]
Fetched 28.0 MB in 23s (1,207 kB/s)
Reading package lists... Done

Install openssh-server

[email protected]:~# apt-get install openssh-server

Check status

[email protected]:~# service ssh status
ssh start/running, process 1975