Sponsored Content
Full Discussion: Cut big text file into 2
Top Forums Shell Programming and Scripting Cut big text file into 2 Post 302321498 by colemar on Monday 1st of June 2009 10:42:52 AM
Old 06-01-2009
Code:
cat bigfile
a
b
c
d potter
e
f pattern
g
h
i
j

grep -n 'p.tter' bigfile
4:d potter
6:f pattern

a=$(grep -n 'p.tter' bigfile)
a=${a%%:*}
echo $a
4

head -$a bigfile
a
b
c
d potter

tail +$((a+1)) bigfile
e
f pattern
g
h
i
j

If you have csplit:
Code:
csplit bigfile '/p.tter/+1'
15
20

cat xx00
a
b
c
d potter

cat xx01
e
f pattern
g
h
i
j

csplit bigfile '/p.tter/+1' '/p.tter/+1'
15
12
8

cat xx00
a
b
c
d potter

cat xx01
e
f pattern

cat xx02
g
h
i
j


Last edited by colemar; 06-01-2009 at 11:52 AM..
 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to cut a text file at a certain spot?

Say I do a date command and get the time from 15 minutes ago. I have a text file with the date printed out every minute or so and I want to cut the file at the date stamp given to me by the 15 minute ago time stamp. Is there an easy way to do this? Example: date +%M gives me 56 I... (2 Replies)
Discussion started by: LordJezo
2 Replies

2. Shell Programming and Scripting

How to cut some data from big file

How to cut data from big file my file around 30 gb I tried "head -50022172 filename > newfile.txt ,and tail -5454283 newfile.txt. It's slowy. afer that I tried sed -n '46467831,50022172p' filename > newfile.txt ,also slow Please recommend me , faster command to cut some data from... (4 Replies)
Discussion started by: almanto
4 Replies

3. Shell Programming and Scripting

Helping in parsing subset of text from a big results file

Hi All, I need some help to effectively parse out a subset of results from a big results file. Below is an example of the text file. Each block that I need to parse starts with "reading sequence file 10.codon" (next block starts with another number) and ends with **p-Value(s)**. I have given... (1 Reply)
Discussion started by: Lucky Ali
1 Replies

4. Shell Programming and Scripting

cut the second line in a text file

Hi I have some problem to cut out the second line in a output file and send to a new file it's a #!/bin/bash script 1 something 2 something 3 something and after I cut 1 something 3 something New file 2 something Thanks in advance (7 Replies)
Discussion started by: pelle
7 Replies

5. UNIX for Dummies Questions & Answers

Cut text from a file

How can I cut the text of definite length say from line no. 20 to 1000? It is trivial ques, but I am very new to Unix. Thanks :) (3 Replies)
Discussion started by: JackR
3 Replies

6. Shell Programming and Scripting

Very big text file - Too slow!

Hello everyone, suppose there is a very big text file (>800 mb) that each line contains an article from wikipedia. Each article begins with a tag (<..>) containing its url. Currently there are 10^6 articles in the file. I want to take random N articles, eliminate all non-alpharithmetic... (14 Replies)
Discussion started by: fedonMan
14 Replies

7. UNIX for Advanced & Expert Users

Help using Awk and cut with a text file

Looking for some help on using awk and cut I have a text file that has fixed information and want to write a script that will prompt the user for an account to search for and pint the output The sample line that has the key information looks like this: Statement to: ... (5 Replies)
Discussion started by: ziggy6
5 Replies

8. UNIX for Dummies Questions & Answers

How to cut a big file into small ones?

Hello all, Currently I have a txt file named as a.txt with the content as: f e100 aa bb cc dd ee ff f e222 aa dd ff gg f e987 dd aa f e2222 gg ff gg aa dd ff ee ee While, for some reason I want to cut a.txt into small ones, e.g. f1.txt, f2.txt, f3.txt and f4.txt. The routine is to... (6 Replies)
Discussion started by: locohd
6 Replies

9. Shell Programming and Scripting

Cut text from a file and remove

Hello Friends, I am stuck with the below problem.Any help will be appreciated. I have a file which has say 100 lines. On the second last line I have a line from which i want to remove certain characters.. e.g CAST(CAST( A as varchar(50)) || ',' || CAST(CAST( B as varchar(50)) || ',' ||... (8 Replies)
Discussion started by: vital_parsley
8 Replies
set_color(1)                                                           fish                                                           set_color(1)

NAME
set_color - set_color - set the terminal color set_color - set the terminal color Synopsis set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR] Description Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple, cyan, white and normal. o -b, --background Set the background color o -c, --print-colors Prints a list of all valid color names o -h, --help Display help message and exit o -o, --bold Set bold or extra bright mode o -u, --underline Set underlined mode o -v, --version Display version and exit Calling set_color normal will set the terminal color to whatever is the default color of the terminal. Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey font color, while set_color --bold white will result in a white font color. Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator. set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of ncurses and recompile fish against it in order to fix this issue. Version 1.23.1 Sun Jan 8 2012 set_color(1)
All times are GMT -4. The time now is 07:46 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy