If you can edit a network connection but other users on your computer
can’t, you may have set the connection to be available to all users.
This makes it so that everyone on the computer can connect using
that connection.
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Open the Activities overview and
start typing Network.
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Click on Network to open the panel.
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Select Wi-Fi from the list on the left.
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Click the
settings button to open the connection
details.
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Select Identity from the pane on the left.
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At the bottom of the Identity panel, check the Make
available to other users option to allow other users to use the
network connection.
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Press Apply to save the changes.