Reading in two lines at once from a text file

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Match text to lines in a file, iterate backwards until text or text substring matches, print to file

hi all, trying this using shell/bash with sed/awk/grep I have two files, one containing one column, the other containing multiple columns (comma delimited). file1.txt abc12345 def12345 ghi54321 ... file2.txt abc1,text1,texta abc,text2,textb def123,text3,textc gh,text4,textd...

2. Programming

How to write in other language in text/xml file by reading english text/xml file using C++?

Hello Team, I have 2 files.one contains english text and another contains Japanese. so i have to read english text and replace the text with Japanesh text in third file. Basically, I need a help to write japanese language in text/xml file.I heard wstring does this.Not sure how do i write...

3. Shell Programming and Scripting

Reading multiple lines in a file

Hello, I am new in shell scripting. I need help regarding following. I have 4 files generated by backups daily. I have stored the names of these 4 files into one file. i.e I have 4 files names as a, b, c & d and these names have been put into one file abcd.txt. Now I want to cat each file in...

4. UNIX for Dummies Questions & Answers

Extracting lines from a text file based on another text file with line numbers

Hi, I am trying to extract lines from a text file given a text file containing line numbers to be extracted from the first file. How do I go about doing this? Thanks!

5. Shell Programming and Scripting

Regarding reading lines into a new file

Hi all, I jut use a loop to read lines from the user and redirect it to a file. echo "Enter the line" while read -r LINE do echo $LINE >> FILE if ;then break fi done input app...

6. Shell Programming and Scripting

skip lines while reading a file

Hi Experts, I am tryin to read a file and while doing so i need to skip the lines which start with a hash (#) char. I thought of using a goto command but a lot of guys on this site say its not the good way to program. Moreover I am using a ksh shell which deos not support goto command. ...

7. Shell Programming and Scripting

reading alternate lines of a file

hi, i have 2 files. file1: 1 2 3 4 5 6 file2: a b c d e f g h i

8. UNIX for Dummies Questions & Answers

Help with reading text file

How can i have a while loop as follows while read inputline do <task> done < name_list and also store the values (delimited) on each line to temp variables so as to print them on screen as follows while read inputline do set name | cut -d "," -f1 name_list # #i know this is not...

9. UNIX for Dummies Questions & Answers

skip reading certain lines in a file

How can I exclude reading lines in a file that contains the following: filesystem:/home/pach/liv_patches 128005120 88456640 37270758 71% /home/patches That is, all lines that contain and begins with filesystem: should not be processed/read from a file

10. UNIX for Advanced & Expert Users

Reading lines within a Unix file.

I have a file that has a list of numbers in it. Each line has a different number. I am trying to create some sort of loop within a script that will pick the numbers up on lines 1 and 2 and then put those figures into the script. It then goes through the process then loops back and reads lines 2 and...

LEARN ABOUT PLAN9

diff

DIFF(1) 						      General Commands Manual							   DIFF(1)

NAME

       diff - differential file comparator

SYNOPSIS

       diff [ -efbwr ] file1 ... file2

DESCRIPTION

       Diff tells what lines must be changed in two files to bring them into agreement.  If one file is a directory, then a file in that directory
       with basename the same as that of the other file is used.  If both files are directories, similarly named files in the two directories  are
       compared  by the method of diff for text files and cmp(1) otherwise.  If more than two file names are given, then each argument is compared
       to the last argument as above.  The -r option causes diff to process similarly named subdirectories recursively.  The  normal  output  con-
       tains lines of these forms:

	    n1 a n3,n4
	    n1,n2 d n3
	    n1,n2 c n3,n4

       These  lines resemble ed commands to convert file1 into file2.  The numbers after the letters pertain to file2.	In fact, by exchanging `a'
       for `d' and reading backward one may ascertain equally how to convert file2 into file1.	As in ed, identical pairs where n1 = n2 or n3 = n4
       are abbreviated as a single number.

       Following  each	of these lines come all the lines that are affected in the first file flagged by `<', then all the lines that are affected
       in the second file flagged by `>'.

       The -b option causes trailing blanks (spaces and tabs) to be ignored and other strings of blanks to compare equal.  The	-w  option  causes
       all white-space to be removed from input lines before applying the difference algorithm.

       The  -e	option produces a script of a, c and d commands for the editor ed, which will recreate file2 from file1.  The -f option produces a
       similar script, not useful with ed, in the opposite order. It may, however, be useful as input to a stream-oriented post-processor.

       Except in rare circumstances, diff finds a smallest sufficient set of file differences.

FILES

       /tmp/diff[12]

SOURCE

       /sys/src/cmd/diff

SEE ALSO

       cmp(1), ed(1)

DIAGNOSTICS

       Exit status is the empty string for no differences, for some, and for trouble.

BUGS

       Editing scripts produced under the -e or -f option are naive about creating lines consisting of a single `.'.
       When running diff on directories, the notion of what is a text file is open to debate.

																	   DIFF(1)

Shell Programming and Scripting