The messages that appeared during boot can be reviewed by pressing
<keycap>Scroll-Lock
</keycap> to turn on the scroll-back buffer. The
<keycap>PgUp
</keycap>,
<keycap>PgDn
</keycap>, and arrow keys can be used to scroll back through the messages. When finished, press
<keycap>Scroll-Lock
</keycap> again to unlock the display and return to the console. To review these messages once the system has been up for some time, type
<command>less /var/run/dmesg.boot
</command> from a command prompt. Press
<keycap>q
</keycap> to return to the command line after viewing.