Shell Practice-sort Sort by detailed

There is a log file on the server Guest.log, each line contains: ID number, name, Internet café Name, the most recent Internet time, Internet hours, the amount of consumption, now requires the file of each row of the sixth column and the second column to be removed in accordance with the consumption amount of reverse output to another file Test.log, please give the shell command?

awk "{Print $6 $}" Guest.log|sort-rn-o Test.log

Sort

1. Principle :

Sort compares each line of a file as a unit, comparing it from the first character backwards, followed by the ASCII value, and then outputting it in ascending order.

2. Parameter Introduction

-U output result de-weight

-R default ascending,-R descending output

-N is sorted by numeric value, no n option, 19:2 small cases appear

-O Avoid redirection to the original file is content is lost

- T -k-t can specify a delimiter-K to specify which part of-T:-K 3 is delimited by a colon, and the third paragraph

-F ignores case (converted to uppercase for comparison)

-C checks whether the file is sorted successfully, does not sort successfully, outputs information about the related row, and returns 1

-C Check whether the file is sorted successfully, not sorted successfully, only returns 1

-B ignores blank portions of each row, starting with the first valid character

For example:

1.txt has the following contents (name: Gender: Age)

Liming:boy:13

Wangsan:boy:12

Liling:girl:14

To sort by age in reverse, you can: sort-t:-K 3-rn 1.txt

650) this.width=650; "Src=" Http://s1.51cto.com/wyfs02/M01/86/8D/wKioL1fDx8KgtG-eAABHLHW5N3I134.jpg-wh_500x0-wm_3 -wmp_4-s_317572192.jpg "title=" sort.jpg "alt=" Wkiol1fdx8kgtg-eaabhlhw5n3i134.jpg-wh_50 "/>

problem thinking and testing : If you add-u the same age people are not only show a

Liming:boy:13

Wangsan:boy:12

Liling:girl:14

Liming2:boy:13

650) this.width=650; "Src=" Http://s5.51cto.com/wyfs02/M00/86/8D/wKiom1fDyDyRxbksAABOS0iCp8I517.jpg-wh_500x0-wm_3 -wmp_4-s_3683047817.jpg "title=" sort1.jpg "alt=" Wkiom1fdydyrxbksaabos0icp8i517.jpg-wh_50 "/>

As the results show, plus-u removes the same rows as the comparison section

This article is from the "Share,open source" blog, so be sure to keep this source http://liqilong2010.blog.51cto.com/3029053/1843842

Shell Practice-sort in a detailed order