02-16-2012
Quote:
Originally Posted by
dinesh1178
I tried copying the lines mentioned here in a text file and used sort. It worked.
You can use uniq to remove duplicate lines.
This may lead to erroneous behaviour : for example if a record contains a single line that already exists in a multi-line record, the singled line record will not be kept eventhough it is uniq from a record point of view.
Sorting and filtering with uniq would not fit with the requirements (as far as i understand them)
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi
Just wondering whether or not I can remove duplicated lines without sort
For example, I use the command who, which shows users who are logging on. In some cases, it shows duplicated lines of users who are logging on more than one terminal.
Normally, I would do
who | cut -d" " -f1 |... (6 Replies)
Discussion started by: lalelle
6 Replies
2. Shell Programming and Scripting
Hi Guys...
Please Could you help me with the following ?
aaaa bbbb cccc sdsd
aaaa bbbb cccc qwer
as you can see, the 2 lines are matched in three fields...
how can I delete this pupicate ? I mean to delete the second one if 3 fields were duplicated ?
Thanks (14 Replies)
Discussion started by: yahyaaa
14 Replies
3. UNIX for Dummies Questions & Answers
Hello all,
I've got a strange behaviour of sort and uniq commands: they do not recognise apparently duplicated lines in a file (already sorted). The lines are identical by eye, but they must differ in smth, because when they are put in two files, those have slightly different size.
What can make... (8 Replies)
Discussion started by: roussine
8 Replies
4. Shell Programming and Scripting
We have an input file as follows:
2010-09-15-12.41.15
2010-09-15-12.41.15
2010-09-15-12.41.24
2010-09-15-12.41.24
2010-09-15-12.41.24
2010-09-15-12.41.24
2010-09-15-12.41.25
2010-09-15-12.41.26
2010-09-15-12.41.26
2010-09-15-12.41.26
2010-09-15-12.41.26
2010-09-15-12.41.26... (3 Replies)
Discussion started by: ux4me
3 Replies
5. Shell Programming and Scripting
Dear All,
Suppose I have a file:
1 1 1 1
2 2 2 2
3 3 3 3I want to insert new line under each old line so that the file would become:
1 1 1 1
1 1 1 1
2 2 2 2
2 2 2 2
3 3 3 3
3 3 3 3How can this be accomplished using awk (or sed)? (5 Replies)
Discussion started by: littlewenwen
5 Replies
6. Shell Programming and Scripting
Hi, if i have a file like this:
Query=1
a
a
b
c
c
c
d
Query=2
b
b
b
c
c
e
.
.
. (7 Replies)
Discussion started by: the_simpsons
7 Replies
7. Shell Programming and Scripting
Hello,
I am trying to eliminate rows where the first field is duplicated, leaving the row where the last field is "NET".
Data file:
345234|22.34|LST
546543|55.33|LST
793929|98.23|LST
793929|64.69|NET
149593|49.22|LST
Desired output:
345234|22.34|LST
546543|55.33|LST... (2 Replies)
Discussion started by: palex
2 Replies
8. UNIX for Dummies Questions & Answers
Hi Everybody! First post! Totally noobie.
I'm using the terminal to read a poorly formatted book.
The text file contains, in the middle of paragraphs, hyphenation to split words that are supposed to be on multiple pages. It looks ve -- ry much like this.
I was hoping to use grep -v " -- "... (5 Replies)
Discussion started by: AxeHandle
5 Replies
9. Shell Programming and Scripting
Dear all,
I always appreciate your help.
I would like to delete lines containing duplicated strings in the second column.
test.txt
658 invert_d2e_q_reg_0_/Qalu_ecl_zlow_e 0.825692
659 invert_d2e_q_reg_0_/Qalu_byp_rd_data_e 0.825692
660 invert_d2e_q_reg_0_/Qalu_byp_rd_data_e 0.825692... (1 Reply)
Discussion started by: jypark22
1 Replies
UNIQ(1) User Commands UNIQ(1)
NAME
uniq - report or omit repeated lines
SYNOPSIS
uniq [OPTION]... [INPUT [OUTPUT]]
DESCRIPTION
Filter adjacent matching lines from INPUT (or standard input), writing to OUTPUT (or standard output).
With no options, matching lines are merged to the first occurrence.
Mandatory arguments to long options are mandatory for short options too.
-c, --count
prefix lines by the number of occurrences
-d, --repeated
only print duplicate lines, one for each group
-D, --all-repeated[=METHOD]
print all duplicate lines groups can be delimited with an empty line METHOD={none(default),prepend,separate}
-f, --skip-fields=N
avoid comparing the first N fields
--group[=METHOD]
show all items, separating groups with an empty line METHOD={separate(default),prepend,append,both}
-i, --ignore-case
ignore differences in case when comparing
-s, --skip-chars=N
avoid comparing the first N characters
-u, --unique
only print unique lines
-z, --zero-terminated
end lines with 0 byte, not newline
-w, --check-chars=N
compare no more than N characters in lines
--help display this help and exit
--version
output version information and exit
A field is a run of blanks (usually spaces and/or TABs), then non-blank characters. Fields are skipped before chars.
Note: 'uniq' does not detect repeated lines unless they are adjacent. You may want to sort the input first, or use 'sort -u' without
'uniq'. Also, comparisons honor the rules specified by 'LC_COLLATE'.
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report uniq translation bugs to <http://translationproject.org/team/>
AUTHOR
Written by Richard M. Stallman and David MacKenzie.
COPYRIGHT
Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
comm(1), join(1), sort(1)
The full documentation for uniq is maintained as a Texinfo manual. If the info and uniq programs are properly installed at your site, the
command
info coreutils 'uniq invocation'
should give you access to the complete manual.
GNU coreutils 8.22 June 2014 UNIQ(1)