Bird Brother Linux Private cuisine Knowledge points Summary 3 to 5 chapters

Feel yourself Right Linux understanding has not been enough, so recently turned to read a "Brother Bird's Linux Private Cuisine ". This is a basic book, lofty high-rise floor, will not much but can learn. This is a few of my knowledge points, although very basic. Hope to share with you.

Chapter 3 host planning and disk partitioning

1.3D computer games require 3D lightand shadow operation.

2, in the Linux system, each device is treated as a file .

3, the entire boot process to the operating system before the action:

(1) BIOS: The boot active firmware will recognize the first device that can be powered on.

(2) MBR : The primary boot partition block, which contains the boot loader, in the first sector that can be opened and used in a device.

(3) boot loader : a software that can read kernel files to execute

(4) kernel file : Start the operating system function

4, the so-called mount, is to use a directory as a point of entry, the disk partition data placed in the directory.

^ (*￣(oo)￣) ^ This chapter is about installing Linux for sector allocation.

Chapter 4 installation of CentOs 5.x and multi-boot tips

^ (*￣(oo)￣) ^ I think this part is the practice of their own, loaded on the line

5th Chapter first landing and online Help man page

^ (*￣(oo)￣) ^ This chapter is to tell we, after the completion of CentOs , there is something inside.

The first input data is definitely a command or an executable file.

Second, write off the Linux with exit This command ( leaving the system is not shutdown )

Three, display the date and time of the command:date

Date +%y/%m/%d

Iv. commands for displaying calendars:cal

To list the current month, direct cat is on the line.

Or cat ten , so you know The calendar for the year month.

Five, easy to use calculator:BC

This plus +, minus -, multiply *, divide /, index ^ , remainder %

Six, [Tab] after the first command of a series of commands, then "command completion"

[Tab] "File Completion" after the second command of a sequence of commands

⑦, there is no syntax format , you can use the man to query

⑧, there are many old help files are under the /usr/share/doc directory

⑨, query system usage Status:

Want to see who is currently online , who can

Want to see the network status, available netstat-a

Want to see the background execution program, available Ps-aux

Ten, the various forms of shutdown :

Eg:

Shutdown- H +10 system automatically shuts down after 10 minutes

Shutdown- R +30 ' the system would reboor '

The system restarts after 30 minutes and displays the following message to all online users

Shutdown- k now ' this systemn'll reboot '

Only the parameters of the warning letter are issued and the system does not shut down

Xi. The steps after forgetting the root Password:

① system reboot, press any key while reading seconds, then press e to enter grub edit mode

② move the cursor to the Kernerl Line, then press e to enter the kernel Edit interface, and then enter single

③ press [Enter], press the b key to boot into the single-user maintenance mode

④ then passwd the last reboot to be settled.

12, manpage ,1 for general account available commands,8 for system administrators commonly used commands,5 Represents the system configuration file format

Finally, I like the sentence:

Learn to be thankful for what you have and eventually you will get more. If you're always brooding over what you don't get, you'll never be satisfied. Presumably, not happy either.

Bird Brother Linux Private cuisine Knowledge points Summary 3 to 5 chapters