How to view system log files in CentOS 7?

You can use the following command in CentOS7 to view system log files:

1. Check system logs with the journalctl command.

journalctl

1. View the log files of specific services, such as system logs:

journalctl -u syslog

1. View the logs within a specific time range.

journalctl --since "2021-01-01 00:00:00" --until "2021-01-02 00:00:00"

1. Viewing logs of a specific logging level, such as displaying only logs of error level.

journalctl -p err

1. View logs for specific keywords:

journalctl | grep "keyword"

1. Output the log to a file.

journalctl > logfile.txt

With the above commands, you can easily view and filter system log files to help pinpoint and resolve system issues.