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journalctl:tldr:e8939
journalctl: Show all messages with priority level 3 (errors) from this [b]oot.
$ journalctl -b --priority=${3}
try on your machine
The command "journalctl -b --priority=${3}" is used to view the system logs (also known as the journal) with a specific log priority level starting from the current boot.
Here is the breakdown of the command:
- "journalctl": This is the main command for accessing and reading the systemd journal.
- "-b": Specifies that the logs should be shown from the current boot session only.
- "--priority=${3}": The "--priority" option is used to filter the logs based on their priority or severity level. The value "${3}" is a placeholder that implies passing an argument to the command when executing it, such as "--priority=3". The actual value determines the severity level that should be displayed. The severity levels range from 0 to 7, where 0 is the highest severity (emergencies) and 7 is the lowest severity (debug messages).
In summary, running this command will display the system logs with a specific severity level starting from the current boot, where the level is determined by the argument passed with "--priority".
This explanation was created by an AI. In most cases those are correct. But please always be careful and
never run a command you are not sure if it is safe.