Why can't I install "dpkg Package Management System"?

Question

linux

I have Ubuntu 16.04 amd64. Tried to install "dpkg Package Management System"? But the installation didn't work.

[email protected]:~$ sudo apt-get install dpkg
Reading package lists... Done
Building dependency tree       
Reading state information... Done
dpkg is already the newest version (1.18.4ubuntu1.1).
0 upgraded, 0 newly installed, 0 to remove and 10 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Could not exec dpkg!
E: Sub-process /usr/bin/dpkg returned an error code (100)

Also, with other programs, the same problem.
Let's say I want to install a program or remove it.
I encounter such a problem every time, but I don’t understand the meaning of this problem, why does it occur every time? And how else to decide?

Answer 1

That is, the inscription "dpkg is already the newest version (1.18.4ubuntu1.1)" well, not at all, well, does it bother you at all?
What does Google say about the query " E: Sub-process /usr/bin/dpkg returned an error code (100) "?
I suspect that in the first 2-3 links you can find the answer and solution to this problem.

Answer 2

dpkg is already the newest version (1.18.4ubuntu1.1).
After this operation, 0 B of additional disk space will be used.
Explanation: dpkg already has the latest version installed.
After this operation, 0 bytes of additional disk space will be used.
and why dpkg?
Use apt-get to install applications, it resolves dependencies, and is essentially a wrapper around dpkg

Answer 3

Сам /usr/bin/dpkg на месте? Права не корёжили ему? Запускается вручную?