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A number of answers describe how to modify properties of a wireless connection via nmcli (for example https://unix.stackexchange.com/q/316482/16821).

However, I don't know how to determine which parameter I should modify. There seem to be several options wep-key[0-4] and psk.

I am able to connect to wifi with no problem by passing the --ask option and entering the password manually.

Which parameter(s) to set?

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All modern WPA-secured Wi-Fi networks use the psk parameter.

nmcli> describe wifi-sec.psk

Pre-Shared-Key for WPA networks. For WPA-PSK, it's either an ASCII passphrase of 8 to 63 characters that is (as specified in the 802.11i standard) hashed to derive the actual key, or the key in form of 64 hexadecimal character. The WPA3-Personal networks use a passphrase of any length for SAE authentication.

The four wep-key parameters are only used for the very obsolete WEP security mechanism.

nmcli> describe wifi-sec.wep-key0

Index 0 WEP key. This is the WEP key used in most networks. See the "wep-key-type" property for a description of how this key is interpreted.

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  • even when I set that parameter I still get a message that >> Warning: password for '802-11-wireless-security.psk' not given in 'passwd-file' and nmcli cannot ask without '--ask' option. <<. I must have a different problem then. Thank you for your answer.
    – tjb
    Jul 15, 2021 at 8:51
  • for some reason I am unable to accept your answer
    – tjb
    Jul 15, 2021 at 8:52

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