10-19-2015
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello,
A basic query. How can I remove a string from a specific column.
For example, remove "abcd" just from column 2 in example file:
abcd abcd1
abcd abcd2
abcd abcd3
to get output:
abcd 1
abcd 2
abcd 3
Thank you!:) (4 Replies)
Discussion started by: auburn
4 Replies
2. Shell Programming and Scripting
Hi All,
I just need a quick fix here. I need to delete all lines containing "." in the 6th column.
Input:
1 1055498 . G T 5.46 .
1 1902377 . C T 7.80 .
1 1031540 . A G 34.01 PASS
1 ... (2 Replies)
Discussion started by: Hkins552
2 Replies
3. Shell Programming and Scripting
I have this:
301205 0000030000041.49000000.00 2011111815505 908
301205 0000020000029.10000000.00 2011111815505 962
301205 0000010000027.56000000.00 2011111815505 3083
312291 ... (2 Replies)
Discussion started by: herot
2 Replies
4. UNIX for Dummies Questions & Answers
Hi, I've got a file that I'd like to uniquely sort based on column 2 (values in column 2 begin with "comp").
I tried sort -t -nuk2,3 file.txtBut got:
sort: multi-character tab `-nuk2,3'
"man sort" did not help me out
Any pointers?
Input:
Output: (5 Replies)
Discussion started by: pathunkathunk
5 Replies
5. UNIX for Dummies Questions & Answers
i have file input
aa,20120626 bb,45Cexpect to remove all lines when $2 doesn't end with 'C"
output
bb,45Ci tried this
sed -i -nl -e '/\<C\>/ {p;} ' file1
but the result : sed illegal option -i (5 Replies)
Discussion started by: radius
5 Replies
6. UNIX for Dummies Questions & Answers
Gurus,
I am relatively new to Unix scripting and am struck with a problem in my script. I have positional input file which has a FLAG indicator in at position 11 in every record of the file.
If the Flag has value =Y, then the record from the input needs to be written to a new file.However if... (3 Replies)
Discussion started by: gsam
3 Replies
7. Shell Programming and Scripting
Hi,
I have a file containing the DDLs of tables in a schema. From that I need to remove all the lines from a starting string till a specific string. Here is an example.
File1.txt
-------------
CREATE TABLE "SCHEMA1"."LKP11_TBL_USERS"
( "ID" NUMBER(8,0) NOT NULL ENABLE,
"USER_ID"... (3 Replies)
Discussion started by: satyaatcgi
3 Replies
8. Shell Programming and Scripting
Dear group,
I have following input text file:
Brit 2016 11 18 12 00 10 1.485,00 EUR
Brit 2016 11 18 12 00 10 142,64 EUR
Brit 2016 11 18 12 00 10 19,80 EUR
Brit 2016 11 18 12 00 10 545,00 EUR
Brit 2016 11 18 12 00 10 6.450,00 EUR... (3 Replies)
Discussion started by: gfhsd
3 Replies
9. Shell Programming and Scripting
Hello,
I'm trying to remove the duplicate consecutive lines with specific string "WARNING".
File.txt
abc;
WARNING 2345
WARNING 2345
WARNING 2345
WARNING 2345
WARNING 2345
bcd;
abc;
123
123
123
WARNING 1234
WARNING 2345
WARNING 2345
efgh; (6 Replies)
Discussion started by: Mannu2525
6 Replies
10. UNIX for Beginners Questions & Answers
Hi,
I came across one issue recently where output from one of the columns of the table from where i am creating input file has newline characters hence, record in the file is spread over multiple lines. Fields in the file are separated by pipe (|) delimiter. As header will never have newline... (4 Replies)
Discussion started by: Prathmesh
4 Replies
LEARN ABOUT DEBIAN
pbmreduce
pbmreduce(1) General Commands Manual pbmreduce(1)
NAME
pbmreduce - read a portable bitmap and reduce it N times
SYNOPSIS
pbmreduce [-floyd|-fs|-threshold ] [-value val] N [pbmfile]
DESCRIPTION
Reads a portable bitmap as input. Reduces it by a factor of N, and produces a portable bitmap as output.
pbmreduce duplicates a lot of the functionality of pgmtopbm; you could do something like pnmscale | pgmtopbm, but pbmreduce is a lot
faster.
pbmreduce can be used to "re-halftone" an image. Let's say you have a scanner that only produces black&white, not grayscale, and it does a
terrible job of halftoning (most b&w scanners fit this description). One way to fix the halftoning is to scan at the highest possible res-
olution, say 300 dpi, and then reduce by a factor of three or so using pbmreduce. You can even correct the brightness of an image, by
using the -value flag.
OPTIONS
By default, the halftoning after the reduction is done via boustrophedonic Floyd-Steinberg error diffusion; however, the -threshold flag
can be used to specify simple thresholding. This gives better results when reducing line drawings.
The -value flag alters the thresholding value for all quantizations. It should be a real number between 0 and 1. Above 0.5 means darker
images; below 0.5 means lighter.
All flags can be abbreviated to their shortest unique prefix.
SEE ALSO
pnmenlarge(1), pnmscale(1), pgmtopbm(1), pbm(5)
AUTHOR
Copyright (C) 1988 by Jef Poskanzer.
02 August 1989 pbmreduce(1)