Detailed explanation of Linux text processing command sort

sort Sort the contents of a text file

Usage: sort + option + file name (can be followed by multiple files)

Example 1: cat 1.txt

sort 1.txt #text, sorted by letters az by default

Example 2: cat 2.txt

sort 2.txt #Numbers, sorted by 1-9 by default

-n parameter: sort -n 2.txt #Add -n to sort the numbers from small to large

-r parameter: sort -n -r 2.txt #-r, sort in reverse order (also applies to text)

If a text has two columns, it is sorted by the first column by default. Example: cat 3.txt

sort 3.txt #Default sorting is by the first column

-t parameter: specify the delimiter

-k parameter: specifies the column to be sorted

Example: sort -t ',' -k2 3.txt #Use comma ',' as the delimiter to sort the second column

Similarly: sort -t ',' -k2n 3.txt # Sort by the second column number from small to large

sort -t ',' -k2nr 3.txt #Sort by the second column number from large to small

Summarize

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