The command is systemctl (lower case L) (short for “system control”), you have typed systemct1 (the number 1).
Anyway, seems like a distribution issue. NetworkManager should be running by default, and if it’s not then either your distributor or your sysadmin have misconfigured something. Either way, questions about this are probably best suited for your distro
Thank you I am sure I tried that also. The problem I was having the person who told that his computer typed a “l” I could not on my computer find that so I tried i, 1 and a lower case L. Anyway I am sure you are correct. I copied over my os and because I can’t get on the internet I can’t re down load a new version. Any ideas?
Because you were running systemct1 (with a 1), you were getting a command-not-found error. systemct1 (with a 1) is not a command that exists, so the system tells you that the command doesn’t exist.
If you run systemctl start NetworkManager (with an lower-case L) and still get a “command not found” error from your shell, then your system is severely broken and we cannot help you here on the GNOME forum. You can try /usr/bin/systemctl start NetworkManager - but even if that works your system is still very broken. If this is the case, I’m surprised that the system even boots.
If you get some different error with systemctl, then you should tell us that error. Note that “Unit not found” is a very different error from “Command not found”.
I copied over my os and because I can’t get on the internet I can’t re down load a new version
I’m not sure what that means…
But if you installed the system in some non-supported way, that sounds like the cause of your issue.