Hi,
thanks for help,

sorry , I forgot to say that:

I connect my laptop via ethernet cable, LAN, to a router
---------------------------------------------------------------------
1.
gfp@Tuxedo ~$ nmcli
virbr0: connected (externally) to virbr0
          "virbr0"
          bridge, 52:54:00:16:E9:74, sw, mtu 1500
          inet4 192.168.100.1/24
          route4 192.168.100.0/24 metric 0

enp53s0: unavailable
          "Realtek RTL8111/8168/8411"
          ethernet (r8169), D4:93:90:07:A2:AD, hw, mtu 1500

----------------------------------------------------------------------

2.
Use "nmcli device show" to get complete information about known devices and
"nmcli connection show" to get an overview on active connection profiles.

Consult nmcli(1) and nmcli-examples(7) manual pages for complete usage 
details.

...........................................................................
3.
gfp@Tuxedo ~$ nmcli device show
GENERAL.DEVICE:                         virbr0
GENERAL.TYPE:                           bridge
GENERAL.HWADDR:                         52:54:00:16:E9:74
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected (externally))
GENERAL.CONNECTION:                     virbr0
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/3
IP4.ADDRESS[1]:                         192.168.100.1/24
IP4.GATEWAY:                            --
IP4.ROUTE[1]:                           dst = 192.168.100.0/24, nh = 
0.0.0.0, mt = 0
IP6.GATEWAY:                            --

GENERAL.DEVICE:                         enp53s0
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         D4:93:90:07:A2:AD
GENERAL.MTU:                            1500
GENERAL.STATE:                          20 (unavailable)
GENERAL.CONNECTION:                     --
GENERAL.CON-PATH:                       --
WIRED-PROPERTIES.CARRIER:               off
IP4.GATEWAY:                            --
IP6.GATEWAY:                            --

......................................................................


4.
gfp@Tuxedo ~$ nmcli connection down <connection name> \
      && nmcli connection up <connection name>
-bash: syntax error near unexpected token `&&'
-----------------------------------------------------------------------
gfp@Tuxedo ~$ nmcli --version
nmcli tool, version 1.41.2
........................................................................

5.
nmcli g
STATE                   CONNECTIVITY  WIFI-HW  WIFI     WWAN-HW  WWAN
connected (local only)  limited       missing  enabled  missing  enabled


Does this mean WIFI is on my lapttop enabled?
If yes, how can I switch it off?

............................................................................
   6.
`nmcli connection down <connection name> \
      && nmcli connection up <connection name>`.

Do I have to include the "dot" at the end?
I guess it shows the end of the sentence.

........................................................................
7.
gfp@Tuxedo ~$ nmcli c
NAME                UUID                                  TYPE      DEVICE
lo                  7a147fe2-d819-4316-8fc3-5048760b8449  loopback  --
virbr0              3806cfd9-88d8-4640-b159-171587357668  bridge    virbr0
Wired connection 1  84733337-c8dc-3c39-8b73-c05ae193c799  ethernet  --

..............................................................................

8.
gfp@Tuxedo ~$ `nmcli connection down <connection name> \
        && nmcli connection up <connection name>`

-bash: command substitution: line 1: syntax error near unexpected token 
`newline'
-bash: command substitution: line 1: `nmcli connection down <connection 
name>   '

....................................................................
9.
gfp@Tuxedo ~$ `nmcli connection down <connection name> \
      && nmcli connection up <connection name>`.

-bash: command substitution: line 1: syntax error near unexpected token `&&'
-bash: command substitution: line 1: `nmcli connection down <connection 
name>     && nmcli connection up <connection name>'
-bash: .: filename argument required
.: usage: . filename [arguments]

I am not sure how the command should look like.
.......................................................................

gfp@Tuxedo ~$ sudo herd restart network-manager
Password:
herd: service 'network-manager' could not be found

I am using MATE desktop

clicking the icon network in the menu line
shows

ethernet:
device: enp53s0
MTU: automatic

There is no possibility shown to enable networking again, no button to 
click....



Kind regards

Gottfried




Am 11.04.23 um 17:48 schrieb Arnaud:
> Hi,
> 
> It depends on how you connect to the Internet.
> 
> On a laptop and with the default configuration, you are probably using 
> Network Manager (which you can check by running `nmcli`).
> 
> If you use Network Manager, you can probably use the following instead
> of rebooting:
>   `nmcli connection down <connection name> \
>     && nmcli connection up <connection name>`.
> 
> 
> Hope that helps,
> 
> -- 
> Arnaud