Published Book on Amazon
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All of IOT Starting with the Latest Raspberry Pi from Beginner to Advanced – Volume 1 |
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All of IOT Starting with the Latest Raspberry Pi from Beginner to Advanced – Volume 2 |
출판된 한글판 도서
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최신 라즈베리파이(Raspberry Pi)로 시작하는 사물인터넷(IOT)의 모든 것 – 초보에서 고급까지 (상) |
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최신 라즈베리파이(Raspberry Pi)로 시작하는 사물인터넷(IOT)의 모든 것 – 초보에서 고급까지 (하) |
Original Book Contents
10.9.3 "sort" Command
This command sorts the data in the specified file according to certain rule and then exports them to standard output.
[Command Format]
| sort [option] [directory/file] |
[Command Overview]
■ This sorts the data in the specified file.
■ User privilege -- Normal user.
[Detail Description]
■ None
[Main Option]
| -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 |
| -r, --reverse | reverse the result of comparisons |
[Used Example]
First, there is a file "customer_list.txt" in the "testdata" directory of the "pi" account, and the contents are as follows.
| pi@raspberrypi ~/testdata $ cat customer_list.txt |
| Microsoft IBM LG Samsung Sony Hewlett-Packard |
Now let's run the "sort" command on this file. The result is as follows. You can see that the output is listed in sorted manner.
| pi@raspberrypi ~/testdata $ sort customer_list.txt |
| Hewlett-Packard IBM LG Microsoft Samsung Sony |
This time we will do the same work with "-r" option. You can see that the sorted data is listed in reverse order to the above example.
| pi@raspberrypi ~/testdata $ sort -r customer_list.txt |
| Sony Samsung Microsoft LG IBM Hewlett-Packard |