On Sunday, April 2, I installed from scatch on all new hardware.
That installation failed to install
net-tools
The whole installation "seemed" to go well,
and on reboot the desktop interface worked well.
While the installation properly used some networking during installation,
afterwords I couldn't access anything beyond my computer, including
apt-get install dctrl-tools
So, while debugging, the following commands were missing
route
ifconfig
During Debian installation, I hand configured partitions on a flashdrive and a hard-drive through the Debian installation prompts as
first drive: /
EFI
second drive: /home
/usr/local
/var
/tmp
swap
The first drive is actually a Kungaru 32 GB USB 3.0 flashdrive with read/write switch
(I have yet to turn the Kunguru flashdrive switch to read-only).
The second drive is a 1 TB internal SATA hard-drive.
During Debian installation, I chose
ssh server
web server
one other (probably email server)
All my other Debian installation interactions were normal.
To resolve this problem, I'll download "net-tools" on another computer,
then on my new computer install
dpkg -i net-tools
I send this email because this is a Debian "stretch" installation problem
that Debian ought to fix.
Note: I am not subscribed to this email list [but this email is germane].
I will follow responses as they occur in the Debian email list archives.