0913&0915 Exercises: Shell Scripts, Sed&awk

Knowledge Point Grooming: Click the link to enter

1. Shell Introduction and variables, scripting related concepts

2. Bash Programming: Condition testing

3. Bash Programming: arithmetic operations

4. Bash Programming: If statements
5. Bash Programming: Case statements, read and user interaction

6. Bash Programming: Process Control

7. Bash Programming: functions and Arrays

8. sed command--stream editor

9. awk Command--report generation tool             

Exercise 1:

Write a script: If a path does not exist, it is created as a directory, otherwise it is present, and the content type is displayed;

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Run the script test:

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Exercise 2:

Write a script to complete the following functions; Determine the given two values, whichever is greater; the method of the given number: script parameter, command interaction

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Run the script test:

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Exercise 3:

The sum of all odd numbers within 100 (at least 3 methods).

Method 1:

Echo ' seq-s ' + "1 2 ' = ' seq-s" + "1 2 100 | BC '

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Method 2: Implement with A For loop

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Run the script test:

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Method 3: Implement with a while loop

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Run the script test:

650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/73/98/wKiom1YBnRHxo-ZuAAA2h3mACwc766.jpg "/>

Exercise 4:

Write a script to implement the following functions:

(1) Pass two text file path to script;

(2) Show the number of blank lines in two files and their blank lines;

(3) Show the total number of files in two files and their total number of rows;

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Run the script test:

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Exercise 5:

Write a script

(1) Prompt user to enter a string

(2) Judgment:

If quit is entered, exit the script

Otherwise, the string content of its input is displayed

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Run the script test:

Exercise 6:

Write a script to print the 2^n table; n equals a user-entered value

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Run the script test:

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Exercise 7:

Write a script that writes a few functions:

Function 1, to achieve the sum of the given two values;

Function 2, take a given two values of greatest common divisor;

Function 3, take a given two values of least common multiple;

The selection of the function and the size of the two numeric values are provided through interactive input.

(not yet understood, IQ recharge ...) ）

0913&0915 Exercises: Shell Scripts, Sed&awk