2019-2020-1 20175313 "design basis information security system," the seventh week of learning summary

A, Linux common commands to learn

By following this command will be able to learn the Linux kernel system calls.

• Use man -k key1|grep key2|...the search what you want in the manpages
• Use whatis keyviewing a Linux command

• Use man n keyto view detailed usage manpages in key

  N behalf of meanings:

  • n = 1: Common Linux commands
  • n = 2: System Calls
  • n = 3: Library Functions

• grep -nr %s 文件名See the contents of the specified location in the file% s are specific to a row.

• The following are specific examples of the above operation for the set of instructions:

  
  
  

• About viewing command Daquan

  • find / locate: View location on a file system.
  • whereis / which: View commands used tool installed in what position
  • file: Check file types
  • cat: View the contents of a text file
  • od -tx1: view the contents of the file in binary form
    grep -nr "% s" File name: see specific number of lines in the file% s
  • ls: view files in the current directory
    

Second, the problem of teaching and learning in the process of resolving

• Problem: virtual machine can not networking

  
  

• Solution : NAT mode, using the virtual NAT device and the virtual machine virtual DHCP server to connect to external networks, and VMware Network Adapter VMnet8 virtual network adapter is used to communicate with the virtual machine.

  
  
  
  

Third, feelings and experiences

This week learning content is relatively simple, it is relatively easy to learn. In addition to the virtual machine can not access the problem bothering me for two days, so I took two days to solve a variety of problems can not access four virtual machines, this week's study time is almost exhausted.

Fourth, learning progress bar

	The number of lines of code (add / accumulate)	Blog amount (add / accumulate)	Learning time (add / accumulate)	Important growth
aims	5000 rows	30	400 hours
Sixth Week	301/1306	2/36	26/80

• Plan study time: 7 hours

• The actual study time: 26 hours

V. References

• The ingenuity of the Linux system call Learning
• "In-depth understanding of computer systems."