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Network manager icon missing in Ubuntu 18.04

Started by Keith, July 11, 2019, 01:24:16 PM

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ASUSTeK P6-P5G41E running Ubuntu 18.04

This machine doesn't have a wireless card so before donating it I bought a USB wireless adapter (Bonest USB 3.0 ) as it mentioned Linux in the blurb.  I ignored the installation disk and plugged it in with no response from the system, which surprised me.  Indeed, the network manager told me that no dongle was detected.
Next I tried installing the Linux software from the disk but the extract command resulted in a message that I didn't have sufficient privileges to do the extraction.  So I abandoned that to return the dongle to Amazon. 
At this point I noticed that the wireless manager icon had disappeared from the tray at top right.  Hmm!  I plugged in a very old, spare USB wireless adapter which connected me immediately, but still no icon. 
Looking on-line for possible solutions, I tried the following with no success:

[email protected]:~$ sudo service network-manager stop
[email protected]:~$ sudo rm /var/lib/NetworkManager/NetworkManager.state
[email protected]:~$ sudo service network-manager start
[email protected]:~$

[email protected]:~$ killall unity-panel-service
unity-panel-service: no process found
[email protected]:~$

[email protected]:~$ sudo apt-get install indicator-applet-complete
   Reading package lists... Done
   Building dependency tree       
   Reading state information... Done
   indicator-applet-complete is already the newest version (12.10.2+17.10.20170425-   0ubuntu1).
   indicator-applet-complete set to manually installed.
   0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
[email protected]:~$

[email protected]:~$ sudo apt-get install --reinstall network-manager network-manager-gnome
[email protected]:~$

Not having the icon is no real problem as I can always get to the network manager via the menus but it's a nuisance if I am giving the machine to a friend and I would be grateful for advice.

Mark Greaves (PCNetSpec)

does running
make the panel applet appear (as long as the terminal stays open) ?
WARNING: You are logged into reality as 'root'
logging in as 'insane' is the only safe option.


Perfect!  And it remains even when the terminal is closed.
You're a star!