You have changed a setting on the NetworkManager profile named lan-static with `nmcli connection modify lan-static ipv4.dns 10.0.0.53`, but resolution still uses the old server. Which command applies the stored profile to the running interface without restarting the NetworkManager service?
LPIC-1 Exam 102-500, objective 109. Networking fundamentals medium
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The options
Correct nmcli connection up lan-static
Correct. `nmcli connection modify` only rewrites the stored profile. Reactivating the profile with `nmcli connection up` is what pushes the new settings onto the device.
Not correct nmcli connection reload
Wrong. That tells NetworkManager to re-read connection files from disk, which is what you need after editing a keyfile by hand. It does not reactivate anything, and after `nmcli connection modify` the daemon already has the change in memory.
Not correct nmcli general reload
Wrong. This reloads NetworkManager's own configuration, /etc/NetworkManager/NetworkManager.conf, not a connection profile.
Not correct nmcli device status
Wrong. It prints a table of devices with their state and the profile attached to each. It is a read-only view and changes nothing.
Why
NetworkManager separates the stored profile from the active configuration on a device: editing the profile never disturbs a running connection. `nmcli connection up NAME` reactivates the profile so the change takes effect, and `nmcli connection down NAME` deactivates it. The general rule is that `nmcli connection` verbs act on profiles, `nmcli device` verbs act on hardware, and only an activation moves settings from one to the other.
Where this comes from
- Cited
- manual page nmcli(1)
Practise this
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