linux foundation - Essay 010_ classroom management system and kernel boot

• Boot and kernel management

• Linux: Kernel + rootfs Kernel: process management, memory management, network management, drivers, file system, security features rootfs: program and glibc library: a collection of functions, function, call interface (header file is responsible for description) program: binaries

• Core Design Genre: single-core (monolithic kernel): Linux all the functionality in the same program, layered different functions, large and complex system microkernel (micro kernel): Windows, Solaris each feature enables a single subsystem implementation, the core functionality to a user space, poor performance

• Kernel package

 

•  Kernel file system storage path, all the core functions concentrated in a single file, which is a single core

 

centos6 synchronization Subdivision:

 

Compare the contents of two folders are the same two commands

1. diff (commonly used to compare the file) 2. Hash Algorithm

 

Close "ctrl + alt + delete" file restart function

 

 

• After centos6,7 on /boot/initramfs-2.6.32-696.e16.x86_64.img damage repair (centos6,7 the same way as) with rescue mode

 

• The method of repair accidentally deleted /boot/vmlinuz-3.10.0-957.el7.x86_64

  

 

 

crontab

Storage path of the file system scheduling tasks.

 

 

• Perform the results of the program, by ⾏ process. Using check disk utilization per minute rate of more than 10% of the alarm.