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Full Discussion: Cat Command and Blank Lines
Top Forums Shell Programming and Scripting Cat Command and Blank Lines Post 302399057 by devtakh on Friday 26th of February 2010 06:34:49 AM
Old 02-26-2010
If you really want to use cat:

Code:
cat file | while read line 
do
echo "$line"
if [ -z "${line}" ]; then 
 echo "Blank line"
fi
done

cheers,
Devaraj Takhellambam
 

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LEARN ABOUT REDHAT

cat

CAT(1)									FSF								    CAT(1)

NAME

       cat - concatenate files and print on the standard output

SYNOPSIS

       cat [OPTION] [FILE]...

DESCRIPTION

       Concatenate FILE(s), or standard input, to standard output.

       -A, --show-all
	      equivalent to -vET

       -b, --number-nonblank
	      number nonblank output lines

       -e     equivalent to -vE

       -E, --show-ends
	      display $ at end of each line

       -n, --number
	      number all output lines

       -s, --squeeze-blank
	      never more than one single blank line

       -t     equivalent to -vT

       -T, --show-tabs
	      display TAB characters as ^I

       -u     (ignored)

       -v, --show-nonprinting
	      use ^ and M- notation, except for LFD and TAB

       --help display this help and exit

       --version
	      output version information and exit

       With no FILE, or when FILE is -, read standard input.

AUTHOR

       Written by Torbjorn Granlund and Richard M. Stallman.

REPORTING BUGS

       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

       Copyright (C) 2002 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

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

	      info cat

       should give you access to the complete manual.

cat (coreutils) 4.5.3						   February 2003							    CAT(1)
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