Differences

This shows you the differences between two versions of the page.

--- networking:networkmanager-nmcli [2026/09/14 15:33] – oscar
+++ networking:networkmanager-nmcli [2026/09/14 16:50] (current) – [nmcli - NetworkManager] oscar
@@ Line 2: / Line 2: @@
 ----
 `nmcli` manages NetworkManager in Linux. Work with two core concepts: **Device** (physical hardware like `eth0` or `wlan0`) and **Connection** (a saved configuration profile).
+Alternatively you could use `nmtui` application with simple console UI (NetworkManager Textual User Interface).
 ### Overview & Diagnostics
@@ Line 161: / Line 163: @@
 |/run/NetworkManager/ \\ /var/lib/NetworkManager/|DNS & Runtime Network State (Auto-generated).Contains internal DHCP leases, runtime connection states, and auto-generated DNS configurations. These do not need to be backed up.|
-## Backing Up and Restoring NetworkManager Configuration
+## Backup/Restore Configuration
 When testing network changes such as bridges, VLANs, or bonds with `nmcli`, back up the NetworkManager connection profiles first. Also capture the current runtime state as a readable reference.
@@ Line 208: / Line 210: @@
 Because `--show-secrets` may reveal credentials, protect this file carefully. Omit `--show-secrets` if the secrets are not needed in the reference copy.
-## 6. Additional protection for a virtual machine
-If the Debian host is a virtual machine, take a hypervisor snapshot before changing the network configuration. This provides a complete rollback point, not only a backup of NetworkManager profiles.
-## Important limitations
-- The profile backup covers persistent NetworkManager connection profiles.
-- It does not necessarily capture temporary runtime-only changes made directly with commands such as `ip address add` or `ip route add`.
-- It does not back up unrelated network configuration, firewall rules, DNS server configuration outside NetworkManager, or custom dispatcher scripts.
-- For a broader system backup, also consider `/etc/NetworkManager/NetworkManager.conf`, `/etc/NetworkManager/conf.d/`, `/etc/NetworkManager/dispatcher.d/`, and any locally maintained firewall configuration.