Old boy Linux+python High-paying employment class first off after class on-machine combat test questions

Old boys education Linux+python high-paying employment class first off after class on-machine combat

(The third Sky Machine Test question)

(10 points for each topic 130 points, over 100 can be, please give detailed steps)

1, create the directory/data/oldboy, and create the file Oldboy.txt in the directory, and then write the contents in the file Oldboy.txt "inet addr:10.0.0.8 bcast:10.0.0.255 Mask : 255.255.255.0 "(does not include quotation marks).

2, the title 1 in the oldboy.txt file content through the command filter only output the following content:

10.0.0.8 10.0.0.255 255.255.255.0

3. Move the Oldboy directory in Title 1 to the/ tmp directory and copy the/etc/passwd file to /tmp/oldboy .

4, on the basis of question 3, using awk to fetch the passwd file, the third column of line three to redirect to/tmp/ In the Oldboy/test.txt file.

5, on the basis of the title 3, the request to delete the file with the command RM prompts the following to prohibit the use of RM , and make the effect permanent effect.

[Email protected] oldboy]# rm-f passwd

Do not use RM command.

6, on the basis of the title 3 , delete /tmp/oldboy/ under passwd other than the file.

7, on the basis of the title 3 , please print the/etc/passwd file in the line 2-5 (no less than three methods)

8, on the basis of the title 3 , use the command to replace the root position and /bin/bash location in the passwd file ? Will all the first and last column locations be swapped?

Cases:

Default: Root:x:0:0:root:/root:/bin/bash

After modification: /bin/bash:x:0:0:root:/root:root

9 . Replace all strings containing oldgirl in the/data directory and its subdirectories with all files that end with the extension. txt as oldboy.

Search/oldboy all 7 days ago file with log ending greater than 1M move / tmp

One, what is the runlevel of Linux, describe the meaning of different numbers of Linux running levels ? ( additional questions )

Please describe the difference between buffer and cache ( additional questions ).

Please say what you know the following characters in Linux can represent the meaning ( additional questions ).

~ -  . ..  | > >> < << !

Answer format:

part 1 :.....

Part 2 :.....

Part 3 :.....

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Old boy Linux+python High-paying employment class first off after class on-machine combat test questions