String interception under Shell

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The maximum, minimum, and average values of a set of numbers are obtained.

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TR tool, which is command, function: case substitution and text substitution

1. Enter lowercase into a file with a for loop first

2. The read file is then piped for conversion. Pipe action: The previous command execution result is given to the next instruction as its input.
   

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Shell script debugging: The shell script is executed sequentially, read an explanation of the article.

Therefore, when debugging, you should

1. Locate the error line.

2. Check the syntax error message, view the source code, and make corrections.

There are several ways to locate errors:

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String interception (8 ways):

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This article is from the "Small Stop" blog, please be sure to keep this source http://10541556.blog.51cto.com/10531556/1790260

String interception under Shell