CompTIA Linux+ (XK0-006)System ManagementMedium
A technician configures a static IPv4 address on connection 'eth0' using 'nmcli con mod eth0 ipv4.addresses 192.168.10.5/24 ipv4.method manual'. Which command is needed to apply these changes without rebooting the server?
- Anmcli device status
- Bnmcli con reload
- Cnmcli con up eth0
- Dnmcli con show eth0
Show answer & explanationAnswer & explanation
Correct answer: C. nmcli con up eth0
'nmcli con up' reactivates the connection profile, applying the modified settings immediately. 'con reload' only rereads configuration files from disk, while 'device status' and 'con show' merely display information without applying changes.
Why the other options are wrong
- A. Displays device state only; does not apply configuration changes.
- B. Rereads connection files from disk but does not reactivate the connection.
- D. Shows connection details only; does not apply changes.
nmcli Connection Apply
After modifying a NetworkManager connection profile with 'nmcli con mod', the profile must be reactivated with 'nmcli con up' to apply changes.
- nmcli con mod edits the stored profile
- Changes are not live until reactivated
- nmcli con up <name> reactivates the connection
- nmcli con show displays but doesn't change settings
Memory trick: Modify then bring it Up to make it live