I want to view the last 24 hours of boot logs using journalctl. How would I do it?
You can use the
journalctl command to view boot logs from the last 24 hours on a Linux system. Here's how you can do it:
Open a terminal on your Linux system.
Run the following
journalctlcommand with appropriate options to filter the logs for the last 24 hours:
sudo journalctl --since "24 hours ago"
This command will display all logs starting from 24 hours ago until the current moment.
- You can also use the
-boption to limit the logs to a specific boot sequence within the last 24 hours. The boot sequences are numbered starting from 0 for the most recent boot, 1 for the boot before that, and so on. For example, to view the logs from the second most recent boot within the last 24 hours, you can use:
sudo journalctl -b -1 --since "24 hours ago"
Remember to use
sudo to ensure you have the necessary permissions to access the logs.
- If you only want to see logs related to boot messages, you can specify the
sudo journalctl -b --identifier=kernel --since "24 hours ago"
This will display only the kernel-related logs from the last 24 hours.
journalctl logs are rotated and pruned by the system, so the exact amount of available logs might vary depending on your system's configuration.
Keep in mind that the exact commands and options might vary slightly depending on your Linux distribution and its version. Always consult the
journalctl manual (
man journalctl) or your distribution's documentation for the most accurate and up-to-date information.