11-05-2007
Hi.
I have encountered very few commands where changing the order of the options changes the results. That's supposed to be a feature, advantage, etc. Specifying libraries on an ld command comes to mind, but I'm not so sure I'd count that as "options".
Clearly, the order of the files to be compared on a diff will change the output, but that's the order of the files, not options. On sort, the order of the keys will make a difference, but I would not consider those options like the on / off value of switches such as "-n", "-u", etc.
In general, I think the principle that the order of the options is not important is at a higher level than an individual command ... cheers, drl
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Can someone please tell me how to sort a file, based on a particular position within the file?
I have a line sequential file that is 152 bytes per record, in which i need to sort the file based on the numeric data in positions 142-152.
I have done the "man sort" command and see the -k option... (1 Reply)
Discussion started by: rjjenkin
1 Replies
2. UNIX for Dummies Questions & Answers
Hi,
I am going to sort a huge flat file using sort command, this file is about 36 million lines, 179 fields delimitered by Ctrl B (002). eg.
1^B198709.....
17^B200301....
3^B196511....
.....
I want this file being sorted by the first field, the result is like :
1^B198709........ (2 Replies)
Discussion started by: xli
2 Replies
3. Shell Programming and Scripting
Hi i have a file containing ip addresses and want to sort those IP addresses in the ascending order.
file (match.txt) contents are:
192.168.0.100
192.168.0.16
192.168.0.10
192.168.0.23
192.168.0.2
192.168.0.3
192.168.0.1
192.168.0.222
i tried:
sort -n match.txt
output is :... (3 Replies)
Discussion started by: manmeet
3 Replies
4. Shell Programming and Scripting
Hi to all.
I'm trying to sort this with the Unix command sort.
user1:12345678:3.5:2.5:8:1:2:3
user2:12345679:4.5:3.5:8:1:3:2
user3:12345687:5.5:2.5:6:1:3:2
user4:12345670:5.5:2.5:5:3:2:1
user5:12345671:2.5:5.5:7:2:3:1
I need to get this:
user3:12345687:5.5:2.5:6:1:3:2... (7 Replies)
Discussion started by: daniel.gbaena
7 Replies
5. Homework & Coursework Questions
I have file ipaddress.txt
192.168.1.25
127.3.9.12
192.168.12.1
127.21.2.3
127.92.80.6
192.168.4.5
I want to sort as
127.3.9.12
127.21.2.3
127.92.80.6
192.168.1.25
192.168.12.1
192.168.4.5
So what sort command do I have to use. (1 Reply)
Discussion started by: RiderOnsky
1 Replies
6. Shell Programming and Scripting
Hello Everybody :) !!!. i have question in mind, is it possible to sort a list of hexadecimal numbers using "sort" command? (9 Replies)
Discussion started by: Kesavan
9 Replies
7. Shell Programming and Scripting
I have a file with the following content:-
181268525,0640613864,B,113,22-dec-2011 14:12:08,
181268525,0640613864,C,113,25-dec-2011 14:18:50,
181268525,0640613864,L,113,26-dec-2011 14:07:46,
181268525,0640613864,X,113,01-jan-2012 16:57:45,
181268525,0640613864,X,113,04-jan-2012 14:13:27,... (3 Replies)
Discussion started by: Yoda
3 Replies
8. Shell Programming and Scripting
I have an input like
4.3.6.66
4.3.6.67
4.3.6.70
4.3.6.25
4.3.6.15
4.3.6.54
4.3.6.44
4.3.6.34
4.3.6.24
4.3.6.14
4.3.6.53
4.3.6.43
4.3.6.49
4.3.6.33
4.3.6.52
4.3.6.19
4.3.6.58
4.3.6.42 (5 Replies)
Discussion started by: dnam9917
5 Replies
9. UNIX for Beginners Questions & Answers
Hi All,
I have used sort -k1 -n data.txt > output.txt command on a large text data file with over 1,000,000 rows. The command managed to sort the data but the code did not read data according to sequence of occurrence. Given below are the first five lines of the data I need to sort;
1 1... (2 Replies)
Discussion started by: Theo Score
2 Replies
uniq(1) General Commands Manual uniq(1)
Name
uniq - report repeated lines in a file
Syntax
uniq [-udc[+n][-n]] [input[output]]
Description
The command reads the input file comparing adjacent lines. In the normal case, the second and succeeding copies of repeated lines are
removed; the remainder is written on the output file. Note that repeated lines must be adjacent in order to be found. For further infor-
mation, see
Options
The n arguments specify skipping an initial portion of each line in the comparison:
-n Skips specified number of fields. A field is defined as a string of non-space, non-tab characters separated by tabs and spaces from its
neighbors.
+n Skips specified number of characters in addition to fields. Fields are skipped before characters.
-c Displays number of repetitions, if any, for each line.
-d Displays only lines that were repeated.
-u Displays only unique (nonrepeated) lines.
If the -u flag is used, just the lines that are not repeated in the original file are output. The -d option specifies that one copy of
just the repeated lines is to be written. The normal mode output is the union of the -u and -d mode outputs.
The -c option supersedes -u and -d and generates an output report in default style but with each line preceded by a count of the number of
times it occurred.
See Also
comm(1), sort(1)
uniq(1)