"shutdown -r" works but "reboot" does not

Question

• Fresh install of Centos 7
• KDE
• kernel: 3.10.0-693.21.1.el7.x86_64

After I do a yum update to update all of the packages, reboot no longer works. I tried to track the problem with no avail. For fun, I tried KDE's Leave > Reboot via the GUI. This worked successfully. I then tried shutdown -h now and that also worked flawlessly. Though, reboot hangs IMMEDIATELY after I hit [Enter], waits about 5-seconds, then goes into Kdump. I get a /var/log/crash/[host]/vmcore-dmesg.txt but have no idea how to interpret the kernel panic's or call traces.

Is there an easier way to find out what's happening and fix what's wrong with my reboot command?

Answer 1

The canonical way to reboot, is now

systemctl reboot

since systemd populate majority of linux distros