Linux Server: Wifi Disconnects Every Few Days - Journalctl Logs

Linux Server: WiFi Disconnects Every Few Days - Journalctl Logs

If you have a computer set up as a server running Linux and the WiFi connection disconnects every few days, this article will guide you through analyzing the issue using journalctl logs. By the end of this article, you will have a better understanding of how to diagnose and potentially resolve this problem.

Understanding journalctl

journalctl is a command-line utility in Linux that allows you to view and analyze system logs. It is part of the systemd init system and can provide valuable information for troubleshooting various issues. In our case, we will use journalctl to examine WiFi connection logs to understand why the connection disconnects every few days.

Analyzing WiFi Connection Logs with journalctl

To begin, open a terminal on your Linux server and run the following command:

This command filters the system logs for the NetworkManager service and displays entries from the past two days. Look for any error messages or warnings related to WiFi connections. For example, you might see messages indicating that the WiFi connection was lost or that the device disconnected.

Interpreting the Log Entries

Once you have identified suspicious log entries, it's essential to interpret them correctly. Here are a few examples of what the log entries might look like and what they could mean:

• wlan0: deauthenticating from IP:MAC_ADDRESS by local choice (Reason: 3=DEAUTH_LEAVING)

  This entry indicates that the WiFi device (wlan0) was deauthenticated by the access point. Reason code 3 typically means that the client is leaving the network.

• wlan0: associate with IP:MAC_ADDRESS (ESSID: "NetworkName")

  This entry shows that the WiFi device associated with the access point with the specified ESSID (NetworkName).

• wlan0: disconnected from IP:MAC_ADDRESS (Reason: 4=ASSOC_LEAVING)

  This entry indicates that the WiFi device disconnected from the access point with the specified MAC address. Reason code 4 typically means that the client is leaving the network.

Resolving WiFi Connection Issues

After analyzing the journalctl logs, you might find that the WiFi connection issues are due to factors such as interference, distance from the access point, or outdated firmware. Here are a few steps you can take to resolve these issues:

• Ensure that the WiFi device is within range of the access point.
• Check for interference from other devices, such as cordless phones or microwaves.
• Update the firmware for the WiFi device.
• Adjust the power management settings for the WiFi device to prevent it from entering power-saving mode.

In this article, we have covered how to analyze WiFi connection logs on a Linux server using journalctl. By understanding the log entries and interpreting their meanings, you can diagnose and potentially resolve WiFi connection issues. Remember to check for interference, distance from the access point, and outdated firmware as potential causes of the problem.

References

• Manpage: journalctl

  https://man7.org/linux/man-pages/man1/journalctl.1.html

• NetworkManager - WiFi Docs

  https://developer.gnome.org/NetworkManager/stable/ WiFi.html

• How to Fix WiFi Connection Issues on Linux

  https://itsfoss.com/fix-wifi-connection-ubuntu/