Use of the sort sort command under the shell

First set up a file, very messy, no rule:

A positive sort:

Inverted sort:

Uniq Delete duplicate rows in a file: Use this command to sort the files first.

For file redundancy, as long as all duplicate characters of the file are displayed once:

Show 1-7 lines that do not repeat:

Show only duplicate rows in 1-7:

All characters in the file are displayed again, and the number of repetitions is calculated:

Author: cnblogs Linuxsuper Meng

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