CIS 3355 Lecture Notes - Lecture 4: Circular Buffer, Multi-Booting, Dmesg

• School: University of Houston
• Department: Computer Information Systems
• Course: CIS 3355
• Professor: Miertschin Susan

Document Summary

The workstation firmware starts, performs a power-on self-test (post), and then looks for a boot loader program. The boot loader runs and determines which linux kernel program to load. The kernel program loads into memory and starts the necessary background programs required for the system to operate. Viewing the boot process: system console displays messages during boot process. If boot messages are hidden from view, press the esc key or ctrl+alt+f1 to view those messages: linux copies boot kernel messages into the kernel ring buffer in memory. [ 0. 000000] linux version 3. 13. 0-37-generic (buildd@kapok) (gcc version 4. 8. 2 (ubuntu 4. 8. 2-19ubuntu1) ) #64-ubuntu smp mon sep 22 21:28:38 utc 2014 (ubuntu 3. 13. 0-37. 64-generic 3. 13. 11. 7) [ 0. 000000] command line: boot_image=/boot/vmlinuz-3. 13. 0-37-generic root=uui: d=09007318-c158-4f3e-b519-e90bc538fb3a ro quiet splash vt. handoff=7. [ 0. 000000] amd authenticamd: most linux distributions also store boot messages in a log file, usually in the. Firmware controls how the installed operating system starts. Basic input/ output system (bios: used on older workstations and servers.