Linux Sort command

1, sort the file each line as a unit, compared to each other, the comparison principle is from the first character backward, followed by the ASCII value of the comparison, and finally they are output in ascending order.

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[[email protected] ~]# cat seq.txt  banana apple pear orange [[email protected] ~]# sort seq.txt   #默认升序 apple banana orangepear

2. Sort-u option---Remove duplicate rows

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[[email protected] ~]# cat seq.txt banana apple   pear orange pear [[email protected] ~]# sort -u seq.txt   apple banana orangepear

3. Sort-r option----Descending

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[[email protected] ~]# sort -u seq.txt   apple banana orange pear [[email protected] ~]# sort -ur seq.txt pear orange bananaapple

4. Sort-o option----Redirect, same as > under Linux

[[Email protected] ~]# Cat SeqNO.txt12345[[Email protected]~]# Sort-r seqNO.txt >Number.txt[[email protected]~]# Cat Number.txt54321[[Email protected]~]# Sort-r SeqNO.txt-o number2.txt[[email protected]~]# Cat Number2.txt54321

5. Sort-n option---Sort by value

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[[email protected] ~]# cat seq2    #排序程序将这些数字按字符来排序了，排序程序会先比较1和2，所以下面的升序中1反而最大。 1 2 5 8 10 11 100 [[email protected] ~]# sort seq2                                                                                          1 10 100 11 2 5 8 [[email protected] ~]# sort -r seq2 8 5 2 11 100 10 1 [[email protected] ~]# sort -n seq2  #-n以数值排序 1 2 5 8 10 11 100 [[email protected] ~]# sort -nr seq2 100 11 10 8 5 2 1 [[email protected] ~]# cat seq2 1 2 5 8 10 11 100 apple banana peal orange [[email protected] ~]# sort -n seq2  #当排序文件有字符和数字，先排序字符，再排序数字 apple banana orange peal 1 2 5 8 10 11 100 [[email protected] ~]# sort -r seq2 peal orange banana apple 8 5 2 11 100 10 1 [[email protected] ~]# sort -rn seq2 100 11 10 8 5 2 1 peal orange banana apple

6, sort-t-k option---t specifies the delimiter,-k specifies which column to sort

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[[email protected] ~]# cat score  #共三列，假使：第一列表示姓名，第二列表示数学分数，第三列表示英语分数 Rusky,80, 90 Jack ,90, 100 Anna ,75, 80 Tom  ,88, 70 [[email protected] ~]# sort -n -k 2 -t , score 　　#以第二列数学分数重新排序，分隔符为逗号 Anna ,75, 80 Rusky,80, 90 Tom  ,88, 70Jack ,90, 100

[[email protected] ~]# sort-n-k 2-t ' Score2 #如果分隔符为空格, use single quotes, with spaces in the middle
Anna 75 80
Rusky 80 90
Tom 88 70
Jack 90 100

[Email protected] ~]# Sort-k 1 score
Anna, 75, 80
Jack, 90, 100
RUSKY,80, 90
Tom, 88, 70

7 Other sort common options

-F converts lowercase letters to uppercase for comparison, i.e. ignores case

-C checks to see if the file is ordered, and if it is out of order, it outputs the information about the first scrambled row, and finally returns 1

-C Checks if the file is ordered, if it is not output, returns only 1

-M is sorted by month, for example, Jan is less than Feb and so on

-B ignores all the blank parts preceding each line, starting with the first visible character.

Sort by numeric value, second column, and third column if the second column is the same [[email protected]~]# Cat Score2rusky the   -Jack -   -Anna the   theTom the   -[[Email protected]~]# Sort-n-K2-K3-T' 'Score2anna the   theTom the   -Rusky the   -Jack -   -

sort in reverse order of third column values [[email protected]~]# sort-t' '-k 3nr Score2 Jack -   -Rusky the   -Tom the   -Anna the   thesort in reverse order of the second column value, if same value, sort in ascending order of the third column [email protected]~]# sort-t' '-K 2NR-k 3n Score2jack -   -Tom the   -Rusky the   -Anna the   the

"From:http://www.cnblogs.com/51linux/archive/2012/05/23/2515299.html"