alternate lines from two files Post: 63336

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

read input from 2 files and print them in alternate columns

Hi Frnz Please help me out. I have two text files. A.txt one two three four B.txt Jan Feb Mar Apr I need the output as

2. Shell Programming and Scripting

alternate lines

Hi, I'm new to Unix. I want to read the all the lines from a text file and write the alternate lines into another file. Please give me a shell script solution. file1 ----- one two three four five six seven newfile(it should contain the alternate lines from the file1) ------- one...

3. 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

4. Shell Programming and Scripting

Insert string in alternate lines

Hi All, In continuation of my previous thread 'Add text at the end of line conditionally', I need to further modfiy the file after adding text at the end of the line. Now, I need to add a fixed charater string at alternate lines starting from first line using awk or sed.My file is now as below:...

5. Shell Programming and Scripting

merging two .txt files by alternating x lines from file 1 and y lines from file2

Hi everyone, I have two files (A and B) and want to combine them to one by always taking 10 rows from file A and subsequently 6 lines from file B. This process shall be repeated 40 times (file A = 400 lines; file B = 240 lines). Does anybody have an idea how to do that using perl, awk or sed?...

6. Programming

Perl : joining alternate lines

Hi, I need to join every alternate line in a file for eg:input file $ cat abc abc def ghi jkloutput abc def ghi jklcode i wrote for this $ cat add_line.pl #!/usr/bin/perl -w my $count=1; #my $line=undef; my @mem_line; my $i=0; my $x=0;

7. Shell Programming and Scripting

Grep values on alternate lines

Hi, I have a file like 2011|ACC|.* 2013|ACC|.* 2011|ACCC|.* 2013|ACCC|.* 2013|ACCV|.* 2011|ADB|.* 2013|ADB|.* 2011|ADBC|.* 2013|ADBC|.* 2011|AIA|.* 2013|AXJ|.* 2013|NNN|.* .* represnts any alphanumeric characters after this part of the string I need a code to return only the...

8. Shell Programming and Scripting

Process alternate lines in awk/sed/perl

hi.. i have a fasta file with the following format >sequence1 CCGGTTTTCGATTTGGTTTGACT >sequence2 AAAGTGCCGCCAGGTTTTGAGTGT >sequence3 AGTGCCGCAGAGTTTGTAGTGT Now, i want to read alternate line and add "GGGGGGGGGGG" to end of every sequence Desired output: >sequence1...

9. Shell Programming and Scripting

Comparing alternate lines of code

Hi gents, Have only a passing familiarity with linux/shell at this point, so please forgive simple question. I have text files that have lines something like the following: a b c d d d e f e f e f a b

10. UNIX for Beginners Questions & Answers

How to print lines from a files with specific start and end patterns and pick only the last lines?

Hi, I need to print lines which are matching with start pattern "SELECT" and END PATTERN ";" and only select the last "select" statement including the ";" . I have attached sample input file and the desired input should be as: INPUT FORMAT: SELECT ABCD, DEFGH, DFGHJ, JKLMN, AXCVB,...

LEARN ABOUT REDHAT

look

LOOK(1) 						    BSD General Commands Manual 						   LOOK(1)

NAME

     look -- display lines beginning with a given string

SYNOPSIS

     look [-dfa] [-t termchar] string [file]

DESCRIPTION

     The look utility displays any lines in file which contain string as a prefix.  As look performs a binary search, the lines in file must be
     sorted (where sort(1) got the same options -d and/or -f that look is invoked with).

     If file is not specified, the file /usr/share/dict/words is used, only alphanumeric characters are compared and the case of alphabetic char-
     acters is ignored.

     Options:

     -d      Dictionary character set and order, i.e. only alphanumeric characters are compared.

     -f      Ignore the case of alphabetic characters.

     -a      Use the alternate dictionary /usr/share/dict/web2

     -t      Specify a string termination character, i.e. only the characters in string up to and including the first occurrence of termchar are
	     compared.

     The look utility exits 0 if one or more lines were found and displayed, 1 if no lines were found, and >1 if an error occurred.

FILES

     /usr/share/dict/words  the dictionary
     /usr/share/dict/web2   the alternate dictionary

SEE ALSO

     grep(1), sort(1)

COMPATIBILITY

     The original manual page stated that tabs and blank characters participated in comparisons when the -d option was specified.  This was incor-
     rect and the current man page matches the historic implementation.

HISTORY

     Look appeared in Version 7 AT&T Unix.

BSD
								   June 14, 1993							       BSD