Shulou(Shulou.com)06/02 Report--

Sort is used to sort text by line, which is arranged by default in the order of ascii characters

Sort-n sorts according to the order of number size

Sort-r reverse sort

Sort supports processing multiple files and combining multiple files into one text processing

Uniq is a deduplicated command that removes duplicate lines. Note that only consecutive lines are removed.

Uniq-c counts and displays the number of duplicate rows

Uniq is often combined with sort:

Sort file | uniq-c

Uniq and sort form set operations:

Suppose there are two files: file1 and file2

1. Finding the intersection is the result of outputting the same lines of the two files:

Sort file1 file2 | uniq-d

two。 Union set

Sort file1 file2 | uniq

3. Find the difference set that appears only in file1

Sort file1 file2 file2 | uniq-u

4. Find the symmetric difference: that is, the union of file1 and file2 minus the intersection of file1 and file2, that is, only in file1 or file2

Sort file1 file2 | uniq-u

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