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Full Discussion: concatenate lines in pairs
Top Forums Shell Programming and Scripting concatenate lines in pairs Post 302430372 by drl on Thursday 17th of June 2010 11:01:50 AM
Old 06-17-2010
Hi.

The paste command can do this:
Code:
#!/usr/bin/env bash

# @(#) s1	Demonstrate joining pairs of lines from a single file, paste.

pe() { for i;do printf "%s" "$i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }

pl " Results from paste:"
cat data1 | paste -d "" - -

exit 0

producing:
Code:
% ./s1

-----
 Results from paste:
/C=IT/O=INFN/OU=Personal Certificate/L=Napoli/CN=Some guy/C=IT/O=INFN/CN=INFN CA
/O=Grid/O=NorduGrid/OU=uninett.no/CN=Another guy/O=Grid/O=NorduGrid/CN=NorduGrid Certification Authority
/C=TW/O=AP/OU=GRID/CN=Someone else/C=TW/O=AS/CN=Academia Sinica Grid Computing Certification Authority Mercury

cheers, drl
 

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LEARN ABOUT SUSE

paste

PASTE(1)							   User Commands							  PASTE(1)

NAME

       paste - merge lines of files

SYNOPSIS

       paste [OPTION]... [FILE]...

DESCRIPTION

       Write  lines  consisting  of  the sequentially corresponding lines from each FILE, separated by TABs, to standard output.  With no FILE, or
       when FILE is -, read standard input.

       Mandatory arguments to long options are mandatory for short options too.

       -d, --delimiters=LIST
	      reuse characters from LIST instead of TABs

       -s, --serial
	      paste one file at a time instead of in parallel

       --help display this help and exit

       --version
	      output version information and exit

AUTHOR

       Written by David M. Ihnat and David MacKenzie.

REPORTING BUGS

       Report paste bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>

COPYRIGHT

       Copyright (C) 2009 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The full documentation for paste is maintained as a Texinfo manual.  If the info and paste programs are properly installed  at  your  site,
       the command

	      info coreutils 'paste invocation'

       should give you access to the complete manual.

GNU coreutils 7.1						     July 2010								  PASTE(1)
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