Linux command sort usage

Linux command sort usage

Sort is a very common command in Linux, a sort of tube
View sort usage with man sort

-B,--ignore-leading-blanks
Ignore leading blanks

-D,--dictionary-order
Consider only blanks and alphanumeric characters

-F,--ignore-case
Fold lower case-to-upper case characters

-G,--general-numeric-sort
Compare according to general numerical value

-I.,--ignore-nonprinting
Consider only printable characters

-M,--month-sort
Compare (unknown) < ' JAN ' < ... < ' DEC '

-H,--human-numeric-sort
Compare human readable numbers (e.g., 2K 1G)

-N,--numeric-sort
Compare according to string numerical value

-R,--random-sort
Sort by random hash of keys

--random-source=file
Get random bytes from FILE

-R,--reverse
Reverse the result of comparisons
1. Sort working principle
Sort compares each line of a file as a unit, comparing it from the first character backwards, to the ASCII value in turn, and finally outputting them in ascending order.

[email protected] ~]# cat Seq.txt nanaapplepearorangemageedu

2, Sort-u
The simple function is to remove duplicate rows in the output line.

[email protected] ~]# cat Seq.txt nanaapplepearorangemageeduapple

[Email protected] ~]# sort-u seq.txt applemageedunanaorangepear

Apple was ruthlessly removed by the-u option because of repetition.
3. Sort's-r option in descending order
Sort by default is in ascending order, if you want to change to descending order, add an-R to get it done.

[email protected] ~]# cat Seq.txt nanaapplepearorangemageeduapple

[Email protected] ~]# sort Seq.txt appleapplemageedunanaorangepear

[Email protected] ~]# sort-r seq.txt pearorangenanamageeduappleapple

4. The-O option for sort
Sort defaults to output the results to standard output, so a redirect is required to write the results to a file, like the sort filename > NewFile.

[Email protected] ~]# sort seq.txt > Ssssss.txt

[email protected] ~]# cat Ssssss.txt appleapplemageedunanaorangepear

However, if you want to output the sorting results to the original file, redirection is not possible.

[Email protected] ~]# sort ssssss.txt > ssssss.txt [[email protected] ~]# cat ssssss.txt [[email protected] ~]#

The contents of the Ssssss.txt were emptied.

[email protected] ~]# cat Number.txt 13524697

Add-o parameter and descending sort result is:

[Email protected] ~]# sort-r number.txt-o number.txt

[email protected] ~]# cat Number.txt 97654321

Now try to see what happens when the contents are letters instead of numbers.

[email protected] ~]# cat Seq.txt appleapplemageedunanaorangepear

[Email protected] ~]# sort-r seq.txt-o seq.txt

[email protected] ~]# cat Seq.txt pearorangenanamageeduappleapple

The result is right, proved successful OH.
5. Sort-n Parameters
Have you ever encountered 10:2 small cases. I've met anyway. Because the sorting program sorts the numbers by character,
The sorting program compares 1 and 2, which is obviously 1 small, so put 10 in front of 2. This is also the sort's consistent style.
For example:

[email protected] ~]# cat Test.txt 1023043461

[Email protected] ~]# sort Test.txt 1102303446

You see the results? Anyway I saw, 2:10 is still in front, haha.
What happens when I add the-n parameter below?

[Email protected] ~]# sort-n test.txt 1246103034

Ok!!!!!!!!!!!!

6, Sort-t and-K usage

[email protected] ~]# cat Dddd.txt banana:30:5.5apple:10:2.5pear:90:2.3orange:20:3.4

This file has three columns, separated by a colon between the column and column, the first column indicates the fruit type, the second column represents the fruit quantity, and the third column represents the fruit price.
So I would like to sort by the number of fruits, that is, in the second column, how to use the sort implementation?
Fortunately, sort provides the-t option, after which you can set the spacer. After you specify a spacer, you can use-K to specify the number of columns.

[Email protected] ~]# sort-n-K 2-t ': ' Dddd.txt apple:10:2.5orange:20:3.4banana:30:5.5pear:90:2.3

[Email protected] ~]# sort-n-K 3-t ': ' Dddd.txt pear:90:2.3apple:10:2.5orange:20:3.4banana:30:5.5

Sort also has a lot of usage, follow-up in Add, thank you for your attention.

This article is from the "Liang blog" blog, make sure to keep this source http://7038006.blog.51cto.com/7028006/1812529

Linux command sort usage