Bird Brother Linux Self-study notes

Brother Bird Linux
You have to keep repeating the practice before you remember a thing that is more familiar.
The file name of each hardware in Linux
HDD/dev/sd[a-p]/dev/hd[a-d]/dev/cdrom/dev/st0
The first sector of the disk (512 bytes) records Two important information: Master boot record MBR (446 bytes) and partition table (64 bytes)
The MBR contains a boot manager, and the partition table records the partitioning of the entire hard disk.
You must first partition the hard disk and then create a file system on the partition to use
The start and end magnetic column numbers identify a range of partitions that can be found in the partition table
A hard disk is divided up into 4 primary partitions primary
The first 4 numbers are/dev/sda1 for the primary partition----/DEV/SDA4 logical partition number starts with 5/DEV/SDA5
Figuring out the relationship between primary partitions, extended partitions, logical partitions
Primary partition plus extended partition up to 4
Extended partitions up to 1
Logical partitions are divided in the extended partition.
Logical partitioning is a format that can be formatted to store data.
Extended partitions can not be formatted and cannot store data
The number of logical partitions varies depending on the operating system and the number of supported
Primary extended Logical
In order to allocate the computer hardware resources reasonably and effectively, so there is an operating system this system software

BIOS and CMOS
CMOS is a read-write parallel or serial flash chip on the motherboard, mainly used to save the hardware configuration of the current system and operators to set certain parameters, the chip is only used to store data.
The CMOS chip is powered by a backup battery, so the CMOS information is not lost either in the shutdown state or in the event of a system power-down.
The BIOS is a software program written to the motherboard, which can be easily set up by entering the BIOS setup program at boot time with a specific key.
CMOS has a size of 128 bytes
CMOS is the place where the system stores parameters, and the program in the BIOS is the means to complete the parameter setting
The correct way to do this is to set the CMOS parameters through the BIOS setup program.

The BIOS is the first program that the computer actively executes after booting
According to the parameters in the BIOS set information to fetch the hard disk that can boot, and to the hard disk to read the first sector of the MBR location
Boot loader from MBR, load driver, load core, load file system, open up
Boot loader is a small software provided by the operating system
Boot loader In addition to the MBR that can be installed, you can also install the boot sector on each partition
Each partition has its own boot sector
Loader can transfer management directly or indirectly to another management process
Boot management program, Boot Manager can be installed in the MBR can also be installed in each partition boot sector boot sector
Linux uses a directory tree schema, but our data is stored in the disk partition, how to combine the data in the directory tree and partition???
To attach data from a partition to a directory
Since we are using a directory tree in our Linux system, we need to plan the installation of the disk partition and the directory tree when we install the system.

Bird Brother Linux Self-study notes