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network-manager applet disappeared

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  network-manager applet disappeared Pegro <pegro@protonmail.com> - 2019-12-15 19:10 +0100
    Re: network-manager applet disappeared freneza <frenezahomo@gmail.com> - 2019-12-15 19:20 +0100
    Re: network-manager applet disappeared Davide Prina <davide.prina@gmail.com> - 2019-12-16 19:50 +0100

#5728 — network-manager applet disappeared

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Yesterday. that is 14 dec 2019,
On debian9 system, using fluxbox
ASUS K52N --- 10 year old

I installed nmap, and then updated my system by apt update; apt upgrade
Run nmap once ( -sn option ONLY (that is only ping-scan)) on my OWN router to see who was connected ...
Then browsed web ( official sites of universities )

this was a prologue, to clarify the situation
-- those were the only actions I took in a long time on this system.

( Using fluxbox and in its init file I do start nm-applet by "nm-applet &" ...
this worked flawlessly ... until now )

Today after starting my system, nm-applet was present, but when I clicked on it, it said "network-manager not started" --or something along those lines ... sorry I cant remember
(essentially, I was just unable to recieve an IP address --- the router does NOT allow me to use static IP addresses)
I run top (as i often do), and for some reason dpkg is using a lot of cpu (10%) which is not usual on my system. After a while it stopped.
I restarted my system, "nm-applet" was NO LONGER in my system, "nmcli" was also NOT present.
bash is unable to find "nmcli, nm-applet, nm-connection-editor"

Could this be a work of virus?   or am I too paranoid
Could this be a result of usage of nmap on such old laptop ?

If this was not appropriate mailing list to send this mail, I apologise ...

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#5729

I don't think this is the right mailing list, however did you try to run 
`apt install --reinstall network-manager`? (nmcli, nm-applet, etc. are 
in network-manager package)

But I find it odd that this has happened to you and it makes no sense, 
perhaps you ran  some kind of unknown script from the internet? or you 
haven't told us everything!

I don't think this has to do with you running on an older system, nmap 
wouldn't erase network-manager if you have an older system ;) :P

On 15/12/2019 20.06, Pegro wrote:
> I restarted my system, "nm-applet" was NO LONGER in my system, "nmcli" 
> was also NOT present.

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#5730

On 15/12/19 19:06, Pegro wrote:

> I was just unable to recieve an IP address --- the router does NOT allow me to use static IP addresses

If I don't mistake, router always allow you to use a static IP 
address... if you select the IP address in the authorized range.

First you need to know a valid IP address not actually used (IP_ADDRESS) 
and the net mask of the network (NETMASK), the network interface of your 
PC (ETH0) and the IP of the router (IP_ROUTER).

I suppose that you are able to know the values of IP_ADDRESS, NETMASK, 
ETH0, and IP_ROUTER

Normally this is the basic step to have a network working:

# ifconfig ETH0 IP_ADDRESS netmask NETMASK
# route add default gw IP_ROUTER

You can also see if the DNS have been setted:
$ cat /etc/resolv.conf

if it is blank you must insert one-two valid entry, for the example the 
following (opendns)

nameserver 208.67.222.222
nameserver 208.67.220.220

When you have correctly activated your network, then you can address all 
other issue you have.

> If this was not appropriate mailing list to send this mail, I apologise ...

I think it is better to ask to the user mailing list...

Ciao
Davide

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