You mean this?
root@openmedivault:~# apt-get install net-tools
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
net-tools
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 248 kB of archives.
After this operation, 963 kB of additional disk space will be used.
Get:1 ftp.gr.debian.org/debian stretch/main amd64 net-tools amd64 1.60+git20161116.90da8a0-1 [248 kB]
Fetched 248 kB in 2s (91.3 kB/s)
Selecting previously unselected package net-tools.
(Reading database ... 55186 files and directories currently installed.)
Preparing to unpack .../net-tools_1.60+git20161116.90da8a0-1_amd64.deb ...
Unpacking net-tools (1.60+git20161116.90da8a0-1) ...
Setting up net-tools (1.60+git20161116.90da8a0-1) ...
Exception ignored in: <function WeakValueDictionary.__init__.<locals>.remove at 0x7f84a49d1730>
Traceback (most recent call last):
File "/usr/lib/python3.5/weakref.py", line 117, in remove
TypeError: 'NoneType' object is not callable
Exception ignored in: <function WeakValueDictionary.__init__.<locals>.remove at 0x7f84a49d1730>
Traceback (most recent call last):
File "/usr/lib/python3.5/weakref.py", line 117, in remove
TypeError: 'NoneType' object is not callable