02-09-2010
Quote:
Originally Posted by
anbu23
That will surely never be beaten
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I am writing a script that is running a loop on one file to obtain records from another file.
Using egrep, I am finding matching records in file b, then outputing feilds of both into another file.
****************************
filea=this.txt
fileb=that.txt
cat $filea | while read line
do... (1 Reply)
Discussion started by: djsal
1 Replies
2. Shell Programming and Scripting
Hello,
So I sorted my file as I was supposed to:
sort -n -r -k 2 -k 1 file1 | uniq > file2
and when I wrote
> cat file2
in the command line, I got what I was expecting, but in the script itself
...
sort -n -r -k 2 -k 1 averages | uniq > temp
cat file2
It wrote a whole... (21 Replies)
Discussion started by: shira
21 Replies
3. UNIX for Dummies Questions & Answers
Hi--
I'm trying to figure out how to use cat more wisely. I have the following command, which works, but I'd like to understand how to get it to work more clearly and efficiently.
cat 'my file.001' 'my file.002' 'my file.003' 'my file.004' 'my file.005' 'my file.006' 'my file.007' 'my... (6 Replies)
Discussion started by: rlinsurf
6 Replies
4. Shell Programming and Scripting
Hello!
I have one strange question - let's say I have a long, multiple-line string displayed on the terminal using echo, and I would like to make a carriage return to the beginning of this string, no to the beginning of the last line - is something like that possible? I would like to be able to... (1 Reply)
Discussion started by: xqwzts
1 Replies
5. UNIX Desktop Questions & Answers
I have a number of files in a directory named like this:
fooP1, fooN1, fooP2, fooN2 ... fooP(i), fooN(i).
I'd like to know how to combine each P and N pair into a single file, foo(i)
TIA
John Balwit (1 Reply)
Discussion started by: balwit
1 Replies
6. Shell Programming and Scripting
Hi everyone,
I'm new to the forums, as you can probably tell... I'm also pretty new to scripting and writing any type of code.
I needed to know exactly how I can grep for multiple strings, in files located in one directory, but I need each string to output to a separate file.
So I'd... (19 Replies)
Discussion started by: LDHB2012
19 Replies
7. UNIX for Dummies Questions & Answers
I have a folder that contains a number of files with file names as follows:
XX.YYYY..ZZZ.2014.001.000000
XX.YYYY..ZZZ.2014.001.000400
XX.YYYY..ZZZ.2014.001.000800
XX.YYYY..ZZZ.2014.001.001200
XX.YYYY..ZZZ.2014.001.001600
.....
XX.YYYY..ZZZ.2014.002.000000
XX.YYYY..ZZZ.2014.002.000400... (8 Replies)
Discussion started by: quakesrus
8 Replies
8. UNIX for Dummies Questions & Answers
Hi,
Is there any way to do a cat * where it shows the name of each file in the process? Similar to what more does below?
$ more ?.sql
::::::::::::::
1.sql
::::::::::::::
set linesize 200
select db_unique_name,
cast(
from_tz(
cast(... (5 Replies)
Discussion started by: newbie_01
5 Replies
9. Shell Programming and Scripting
I am looking for help in processing of those options: '-n' or '-p'
I understand what they do and how to use them.
But, I would like to use them with more than one file (and without any shell-loop; loading the 'perl' once.)
I did try it and -n works on 2 files.
Question is:
- is it possible to... (6 Replies)
Discussion started by: alex_5161
6 Replies
10. UNIX for Beginners Questions & Answers
Hello All!
Thanks for taking time out and helping.
My issue is, I have two files that have file names in it. Now, i need to go through each line of both the files and when the file names are different, i need to rename the file. Below is the example:
File1</
fil1ename1.txt
filename2,txt... (2 Replies)
Discussion started by: svks1985
2 Replies
LEARN ABOUT DEBIAN
plan9-read
CAT(1) General Commands Manual CAT(1)
NAME
cat, read, nobs - catenate files
SYNOPSIS
cat [ file ... ]
read [ -m ] [ -n nline ] [ file ... ]
nobs [ file ... ]
DESCRIPTION
Cat reads each file in sequence and writes it on the standard output. Thus
cat file
prints a file and
cat file1 file2 >file3
concatenates the first two files and places the result on the third.
If no file is given, cat reads from the standard input. Output is buffered in blocks matching the input.
Read copies to standard output exactly one line from the named file, default standard input. It is useful in interactive rc(1) scripts.
The -m flag causes it to continue reading and writing multiple lines until end of file; -n causes it to read no more than nline lines.
Read always executes a single write for each line of input, which can be helpful when preparing input to programs that expect line-at-a-
time data. It never reads any more data from the input than it prints to the output.
Nobs copies the named files to standard output except that it removes all backspace characters and the characters that precede them. It is
useful to use as $PAGER with the Unix version of man(1) when run inside a win (see acme(1)) window.
SOURCE
/src/cmd/cat.c
/src/cmd/read.c
/bin/nobs
SEE ALSO
cp(1)
DIAGNOSTICS
Read exits with status eof on end of file or, in the -n case, if it doesn't read nlines lines.
BUGS
Beware of and which destroy input files before reading them.
CAT(1)