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Full Discussion: Append by line number
Top Forums Shell Programming and Scripting Append by line number Post 303003463 by apmcd47 on Thursday 14th of September 2017 06:17:19 AM
Old 09-14-2017
Why can't you use paste? It should be a standard Linux command.

This sed script may work with the caveat that I don't guarantee all lines will be pasted (should one file be longer than the other):

Code:
printf "%s\n" {a..z} > rightfile
printf "%s\n" {1..26} > leftfile
< rightfile sed 's/\^/\\^/g'  | sed '=;s!^!s^$^ !;s!$!^!'  | sed 'N;s/\n/\t/' > tmpfile
< leftfile sed -f tmpfile
1 a
2 b
3 c
4 d
5 e
6 f
7 g
8 h
9 i
10 j
11 k
12 l
13 m
14 n
15 o
16 p
17 q
18 r
19 s
20 t
21 u
22 v
23 w
24 x
25 y
26 z

I've written it so you can type
Code:
< file

and then paste the rest of the line from the first sed.

It's horrible but it works on my Ubuntu system.

Andrew

Last edited by apmcd47; 09-14-2017 at 10:10 AM.. Reason: clarification about why I I don't guarantee all lines will be pasted
 

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PASTE(1)						    BSD General Commands Manual 						  PASTE(1)

NAME
paste -- merge corresponding or subsequent lines of files SYNOPSIS
paste [-s] [-d list] file ... DESCRIPTION
The paste utility concatenates the corresponding lines of the given input files, replacing all but the last file's newline characters with a single tab character, and writes the resulting lines to standard output. If end-of-file is reached on an input file while other input files still contain data, the file is treated as if it were an endless source of empty lines. The options are as follows: -d list Use one or more of the provided characters to replace the newline characters instead of the default tab. The characters in list are used circularly, i.e., when list is exhausted the first character from list is reused. This continues until a line from the last input file (in default operation) or the last line in each file (using the -s option) is displayed, at which time paste begins selecting characters from the beginning of list again. The following special characters can also be used in list: newline character tab character \ backslash character Empty string (not a null character). Any other character preceded by a backslash is equivalent to the character itself. -s Concatenate all of the lines of each separate input file in command line order. The newline character of every line except the last line in each input file is replaced with the tab character, unless otherwise specified by the -d option. If '-' is specified for one or more of the input files, the standard input is used; standard input is read one line at a time, circularly, for each instance of '-'. EXIT STATUS
The paste utility exits 0 on success, and >0 if an error occurs. EXAMPLES
List the files in the current directory in three columns: ls | paste - - - Combine pairs of lines from a file into single lines: paste -s -d ' ' myfile Number the lines in a file, similar to nl(1): sed = myfile | paste -s -d ' ' - - Create a colon-separated list of directories named bin, suitable for use in the PATH environment variable: find / -name bin -type d | paste -s -d : - SEE ALSO
cut(1), lam(1) STANDARDS
The paste utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. HISTORY
A paste command appeared in Version 32V AT&T UNIX. BSD
June 25, 2004 BSD
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