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1. UNIX for Dummies Questions & Answers
I have a file that looks like this:
n1 1
n2 1
n3 1
n4 3
n4 3
n2 5
n2 5
n2 5
n2 5
n3 5
n3 5
n4 6
n7 6
that is a name followed be a descriptive number.
I want to make these numbers sequential starting from 0 but without changing the "neighbours" each name belongs to. So the above... (3 Replies)
Discussion started by: FelipeAd
3 Replies
2. Shell Programming and Scripting
Hi
I have a file like this:
Peter North
Mary
Peter North
Peter Borough
Mary
I need there to put 'X' (or anything) on a new line between the two lines where 'Peter' begins the line. There will be many matches to this string, but they will always begin with 'Peter'.
Ie, the resulting... (2 Replies)
Discussion started by: majormajormajor
2 Replies
3. UNIX for Dummies Questions & Answers
Hi experts, I've been struggling to format a large genetic dataset. It's complicated to explain so I'll simply post example input/output
$cat input.txt
ID GENE pos start end
blah1 coolgene 1 3 5
blah2 coolgene 1 4 6
blah3 coolgene 1 4 ... (4 Replies)
Discussion started by: torchij
4 Replies
4. UNIX for Dummies Questions & Answers
I have a csv flatfile with a few million rows. I need to replace a field (field number is 85) in the file with a sequential number.
As an example, let's assume there are only 4 fields in the file:
A,A,,32
A,A,,27
A,B,,43
C,C,,354
If I wanted to amend the 3rd field in this way my... (2 Replies)
Discussion started by: BristolSmithy
2 Replies
5. Shell Programming and Scripting
Hi All,
I am looking for a simple way to write numbers to a file sequentially starting from 1 and ending on a specified upper limit. Example of the output file is below
Example
1
2
3
4
5
.
.
.
.
1000
please let me know the best way to do it. (10 Replies)
Discussion started by: Lucky Ali
10 Replies
6. Shell Programming and Scripting
I can rename a file with sequential numbers from 1 to N with this script:
num=1
for file in *.dat;do
mv "$file" "$(printf "%u" $num).txt"
let num=num+1
done
The script begins with renaming a some.dat file to 1.dat.txt and goes on sequentially renaming other DAT files to... (1 Reply)
Discussion started by: shoaibjameel123
1 Replies
7. Programming
Writing a Tool to simulate non-sequential disk I/O (simulate db file sequential read) in C POSIX
I have over the years come across the same issue a couple of times, and it normally is that the read speed on SAN is absolutely atrocious when doing non-sequential I/O to the disks. Problem being of... (7 Replies)
Discussion started by: vrghost
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8. Shell Programming and Scripting
Hi there,
Firstly, I have no experience with shell scripts so would really appreciate some help.
I have the following shell script that is causing some problems:
moveit()
{
&& set -x
if
then
DOUBLE_DELIVERY=$(grep... (6 Replies)
Discussion started by: thebeno
6 Replies
9. Shell Programming and Scripting
I have a text file in the following format
....
START
1,1
2,1
3,1
..
..
9,1
10,1
END
....
I want to change to the output to
....
START
1,1
2,1
3,1
.. (4 Replies)
Discussion started by: VNR
4 Replies
10. Programming
We have to convert a sequential file to a 80 char line sequential file (HP UX platform).The sequential file contains special characters. which after conversion of the file to line sequential are getting coverted into "new line" or "tab" and file is getting distorted. Is there any way to read these... (2 Replies)
Discussion started by: Rajeshsu
2 Replies
UNIQ(1) BSD General Commands Manual UNIQ(1)
NAME
uniq -- report or filter out repeated lines in a file
SYNOPSIS
uniq [-cdu] [-f fields] [-s chars] [input_file [output_file]]
DESCRIPTION
The uniq utility reads the standard input comparing adjacent lines, and writes a copy of each unique input line to the standard 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 Don't output lines that are not repeated in the input.
-f fields
Ignore the first fields in each input line when doing comparisons. A field is a string of non-blank characters separated from adja-
cent 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 fields fields will be ignored. Character numbers are one based, i.e. the first character is
character one.
-u Don't output lines that are repeated in the input.
If additional arguments are specified on the command line, the first such argument is used as the name of an input file, the second is used
as the name of an output file.
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.
BSD
January 6, 2007 BSD