logs files in fedora are stored in /var/log
ls /var/log
The Gnome Logs application (gnome-logs) can be very useful tools to view system log files on Fedora's Gnome Desktop.
Since Fedora 20, we use journalctl by default. Regular files such as /var/log/messages are no longer available by default. Of course, you can install rsyslog and journalctl will generate them for you if you want. journalctl itself has many many options. For example, you can filter the log based on different criteria. You can view the current or previous boot logs using the -b flag. Here are some examples from man journalctl (Please read the man page for more detailed information on the available options):
Without arguments, all collected logs are shown unfiltered:
journalctl
With one match specified, all entries with a field matching the expression are shown:
journalctl _SYSTEMD_UNIT=avahi-daemon.service
If two different fields are matched, only entries matching both expressions at the same time are shown:
journalctl _SYSTEMD_UNIT=avahi-daemon.service _PID=28097
If two matches refer to the same field, all entries matching either expression are shown:
journalctl _SYSTEMD_UNIT=avahi-daemon.service _SYSTEMD_UNIT=dbus.service
If the separator "+" is used, two expressions may be combined in a logical OR. The following will show all messages from the Avahi service process with the PID 28097 plus all messages from the D-Bus service (from any of its processes):
journalctl _SYSTEMD_UNIT=avahi-daemon.service _PID=28097 + _SYSTEMD_UNIT=dbus.service
Show all logs generated by the D-Bus executable:
journalctl /usr/bin/dbus-daemon
Show all logs of the kernel device node /dev/sda:
journalctl /dev/sda
Show all kernel logs from previous boot:
journalctl -k -b -1
