Differences

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--- ubuntu:networking:ports:port_already_in_use [2021/02/05 14:29] – peter
+++ ubuntu:networking:ports:port_already_in_use [2021/02/05 14:36] (current) – peter
@@ Line 14: / Line 14: @@
 systemd-r 1019 systemd-resolve   13u  IPv4  45567      0t0  TCP 127.0.0.53:domain (LISTEN)
 </code>
+<WRAP info>
+**NOTE:**  This shows it is being used by systemd-resolve.
+</WRAP>
 ----
@@ Line 28: / Line 33: @@
 tcp            LISTEN       0            4096         127.0.0.53%lo:domain        0.0.0.0:*                users:(("systemd-resolve",pid=1019,fd=13))
 </code>
+<WRAP info>
+**NOTE:**  This shows it is being used by systemd-resolve.
+</WRAP>
+----
+===== Disable any service that is running on this port =====
+<code bash>
+sudo systemctl stop systemd-resolved
+sudo systemctl disable systemd-resolved
+sudo systemctl mask systemd-resolved
+</code>
+<WRAP info>
+**NOTE:**  The mask is to prevent this service auto starting on reboot.
+</WRAP>
+----
+To undo what you did:
+<code bash>
+sudo systemctl unmask systemd-resolved
+sudo systemctl enable systemd-resolved
+sudo systemctl start systemd-resolved
+</code>
+<WRAP info>
+**NOTE:**  An alternative to the **enable** command is:
+<code bash>
+sudo systemctl defaults systemd-resolved
+</code>
+</WRAP>