The sort command for Linux is to help us sort by different data types, its syntax and common parameter formats: sort [-bcfmnrtk][source file][-o output file] Supplemental Description: Sort can be sorted against the contents of a text file in the unit of behavior. The parameter: -b ignores the space character that begins before each line. -c Check to see if the files are sorted in order. -f when sorting, ignores uppercase and lowercase letters. -M sorts the first 3 letters according to the abbreviation of the month. -n sorts according to the size of the numbers. -o< output File > stores the sorted results in the specified file. -r is sorted in reverse order. -t< Delimited character > specifies the field separator character to use when sorting. -k Choose which interval to sort by. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ the use of sort is described below in a few examples. (1) 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] programming]$ cat seq.txtbananaapplepearorange[[email protected] programming]$ sort Seq.txtapplebananaorangepear users can save the sorted file contents, or output the sorted file contents to the printer. In the following example, the user saves the sorted file contents to a file named result. $ sort Seq.txt > result (2) Sort's-u option It's a simple function of removing duplicate rows in the output line. [[email protected] programming]$ cat Seq.txtbananaapplePearorangepear[[email protected] programming]$ sort seq.txtapplebananaorangepearpear[[email protected] programming]$ sort-u Seq.txtapplebananaorangepearpear was ruthlessly removed by the-u option because of repetition. (3) the-R option for sort is sorted by default in ascending order, and if you want to change to descending order, add an-R to it. [[email protected] programming]$ cat number.txt13524[[email protected] programming]$ sort number.txt12345[ [email protected] programming]$ sort-r number.txt54321 (5) Sort's-o option because sort defaults to outputting the results to standard output, a redirect is required to write the results to a file, such as the sort filename > NewFile. However, if you want to output the sorting results to the original file, redirection is not possible. [[email protected] programming]$ sort-r number.txt > number.txt[[email protected] programming]$ Cat Number.txt[[email protected] programming]$ See, the number was emptied. At this point, the-O option appears, which successfully solves this problem, allowing you to confidently write the results to the original file. This may also be the only advantage of the-o specific direction. [[email protected] programming]$ cat number.txt13524[[email protected] programming]$ sort-r number.txt-o Number.txt[[email protected] programming]$ cat number.txt54321 (6) sort-n option have you ever encountered 10:2 small cases. I've met anyway. This occurs 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. If we want to change this situation, we need to use the-n option to tell sort, "Sort by value"! [[email protected] programming]$ cat number.txt110191125[[email protected] programming]$ sort Number.txt110111925[[email protected] programming]$ sort-n number.txt125101119 (7) Sort the-t option and the-K option if there is a file with the contents of this: [[email protected] programming]$ cat Facebook.txtbanana:30:5.5apple:10:2.5pear : 90:2.3orange:20:3.4 This file has three columns, separated by a colon between columns and columns, the first column represents the fruit type, the second column indicates the number of fruits, 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] programming]$ sort-n-K 2-t ': ' Facebook.txtapple:10:2.5orange:20:3.4banana:30:5.5pear : 90:2.3 (8) Other sort common options-f converts lowercase letters to uppercase to compare, that is, ignore case-C checks if the file is ordered, if it is out of order, it prints the information about the first disorderly row, and finally returns 1-C checks to see if the file is ordered. If the order is not output, only the returned 1-m will be sorted by month, for example, Jan is less than Feb and so-B ignores all the blank parts preceding each line, starting with the first visible character.
Sort usage of Linux
