Actually the cat is useless, and you can use sort -u to avoid the uniq. You probably want numeric sort anyway.
Your example suggests you want the last three numbers (i.e. simply tail -n 3 file), not the sorted output. The last three numbers from an ascending sort would be 382, 432, and 433 from the sample input you provided.
Hi All,
I am encountered with a problem while sorting a file based on multiple columns . I need to sort like:
(field2,ascending) , (field3,ascending) ,(field8,descending) , (field7,ascending),(field13,ascending).
So far i was sorting only in ascending order but here i need to use one... (1 Reply)
hi all
i want to remove some descending order number
example :
1 100 200 135.00 Gk_wirs 1
1 100 200 136.00 Gk_wirs 50
1 110 210 138.00 Gk_wirs 60
1 100 200 136.00 Gk_wirs 57 ----> how to remove... (6 Replies)
I have a text file where I want to append a column of numbers in ascending orders.
Input:
57 abc
25 def
32 ghi
54 jkl
Output:57 abc
57 abc 1
25 def 2
32 ghi 3
54 jkl 4
How do I go about doing that? Thanks! (11 Replies)
Hi,
I am trying to sort the following file in descending order of its fourth column.
2 1 363828 -2.423225e-03
3 1 363828 4.132763e-03
3 2 363828 8.150133e-03
4 1 363828 4.126890e-03
I use
sort -k4,4g -r input.txt > output.txt ... (1 Reply)
Hi,
I have a problem . I have few directories like inpTDT_1, inpTDT_2, inpTDT_3 and so on inside HOME directory . In one of my perl script (which is in my HOME), the above directories like inpTDT_1, inpTDT_2, inpTDT_3 are sorting out in an order So I wanted to sort all the inpTDT_1, inpTDT_2,... (1 Reply)
Discussion started by: venkatesh
1 Replies
LEARN ABOUT OPENDARWIN
uniq
UNIQ(1) BSD General Commands Manual UNIQ(1)NAME
uniq -- report or filter out repeated lines in a file
SYNOPSIS
uniq [-c | -d | -u] [-i] [-f num] [-s chars] [input_file [output_file]]
DESCRIPTION
The uniq utility reads the specified input_file comparing adjacent lines, and writes a copy of each unique input line to the output_file. If
input_file is a single dash ('-') or absent, the standard input is read. If output_file is absent, standard output is used for output. The
second and succeeding copies of identical adjacent input lines are not written. Repeated lines in the input will not be detected if they are
not adjacent, so it may be necessary to sort the files first.
The following options are available:
-c Precede each output line with the count of the number of times the line occurred in the input, followed by a single space.
-d Only output lines that are repeated in the input.
-f num Ignore the first num fields in each input line when doing comparisons. A field is a string of non-blank characters separated from
adjacent fields by blanks. Field numbers are one based, i.e. the first field is field one.
-s chars
Ignore the first chars characters in each input line when doing comparisons. If specified in conjunction with the -f option, the
first chars characters after the first num fields will be ignored. Character numbers are one based, i.e. the first character is
character one.
-u Only output lines that are not repeated in the input.
-i Case insensitive comparison of lines.
DIAGNOSTICS
The uniq utility exits 0 on success, and >0 if an error occurs.
COMPATIBILITY
The historic +number and -number options have been deprecated but are still supported in this implementation.
SEE ALSO sort(1)STANDARDS
The uniq utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
HISTORY
A uniq command appeared in Version 3 AT&T UNIX.
BSD June 6, 1993 BSD