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Full Discussion: using vi -c to remove empty lines
Top Forums Shell Programming and Scripting using vi -c to remove empty lines Post 302446112 by kevintse on Tuesday 17th of August 2010 09:19:18 PM
Old 08-17-2010
If you just want to remove empty lines, you can simply use grep.
The following one liner removes all empty lines(those contains spaces, tabs, or nothing) in a file.
Code:
grep -E '[^   ]+$' filename

 

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LEARN ABOUT REDHAT

rmdir

RMDIR(1)								FSF								  RMDIR(1)

NAME

       rmdir - remove empty directories

SYNOPSIS

       rmdir [OPTION]... DIRECTORY...

DESCRIPTION

       Remove the DIRECTORY(ies), if they are empty.

       --ignore-fail-on-non-empty

	      ignore each failure that is solely because a directory is non-empty

       -p, --parents
	      remove  DIRECTORY, then try to remove each directory component of that path name.  E.g., `rmdir -p a/b/c' is similar to `rmdir a/b/c
	      a/b a'.

       -v, --verbose
	      output a diagnostic for every directory processed

       --help display this help and exit

       --version
	      output version information and exit

AUTHOR

       Written by David MacKenzie.

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 rmdir is maintained as a Texinfo manual.  If the info and rmdir programs are properly installed at your site,
       the command

	      info rmdir

       should give you access to the complete manual.

rmdir (coreutils) 4.5.3 					   February 2003							  RMDIR(1)
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