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Full Discussion: Adding new line at the end of file
Top Forums Shell Programming and Scripting Adding new line at the end of file Post 302143978 by radoulov on Monday 5th of November 2007 04:47:20 PM
Old 11-05-2007
Quote:
Originally Posted by somesh_p
Yes.. it is working fine for the files that doens't have a blank line at the end of file

But, if the file already contains a blank line at the end, the modified file is becoming zero bytes. It shouldn't modify the file, if it already has blank line at the end
[...]
I told you the command is:

Code:
sed '${/^$/!s/$/\
/;}' filename

and NOT:

Code:
sed '${/^$/!s/$//;}'

It works even on my old Solaris Smilie

Code:
$ cat file1
line1
line2
line3
line4
$ cat file2
line1
line2
line3
line4

$ sed '${/^$/!s/$/\
> /;}' file1
line1
line2
line3
line4

$ sed '${/^$/!s/$/\
/;}' file2
line1
line2
line3
line4

$

 

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LEARN ABOUT DEBIAN

vbindiff

VBINDIFF(1)						       Christopher J. Madsen						       VBINDIFF(1)

NAME

       vbindiff - hexadecimal file display and comparison

SYNOPSIS

       vbindiff file1 [ file2 ]

DESCRIPTION

       Visual Binary Diff (VBinDiff) displays files in hexadecimal and ASCII (or EBCDIC).  It can also display two files at once, and highlight
       the differences between them.  Unlike diff, it works well with large files (up to 4 GB).

       Viewing files

	Movement Keys
	-------------
	Up	Move one line (16 bytes) towards the beginning of the file
	Down	Move one line (16 bytes) towards the end of the file
	Left	Move one byte towards the beginning of the file
	Right	Move one byte towards the end of the file
	PageUp	Move one page towards the beginning of the file
	PageDn	Move one page towards the end of the file
	Home	Move to the beginning of the file
	End	Move to the end of the (shorter) file
	F	Search for a string or byte sequence
	G	Move to a specified file position

       When displaying two files, both files move together.  If bytes have been added or removed in one of the files, you can adjust the compari-
       son by moving just one of the files.  To move only the top file, press "T".  To move only the bottom file, press "B".  To return to moving
       both files, press the same key again.  (The window at the bottom of the screen will indicate when you are moving only one file.)

	Other Keys
	----------
	Enter  Move to the next difference between the files
	Space  (same as Enter)
	C      Toggle between ASCII and EBCDIC display
	E      Edit currently displayed section of file
	Esc    Exit VBinDiff
	Q      Exit VBinDiff

       The "Enter" key will advance to the next difference between the files (after those already displayed on the screen).  If there are no more
       differences, it moves to the end.

       Line editor

       The line editor is used to enter search strings and file positions.  It uses the basic Emacs-style editing keys.

	Keys
	-----------------
	Ctrl-B, Left	   Move the cursor one character left
	Ctrl-F, Right	   Move the cursor one character right
	Ctrl-A, Home	   Move to the beginning of the line
	Ctrl-E, End	   Move to the end of the line
	Ctrl-P, Up	   Move up in input history
	Ctrl-N, Down	   Move down in input history
	Ctrl-H, Backspace  Delete the character to the left
	Ctrl-D, Delete	   Delete the character under the cursor
	Ctrl-K		   Delete from cursor to end of line
	Insert		   Toggle between insert & overstrike mode
	Enter		   Finished entering text
	Esc		   Abort the operation

       Editing files

       You can press "E" to edit the current file.  When displaying two files, this edits the one in the top window, unless you are in "move bot-
       tom" mode.

       When editing, you can move the cursor around with the arrow keys.  Use TAB to switch between entering hexadecimal or ASCII (or EBCDIC)
       characters.  Press the Esc key when you are done.  You will be given the choice to save or discard your changes then.

       If you are displaying two files, you can use the Enter key to copy a byte from the other file into the one you are editing.

       You cannot scroll through the file while editing, although you can save your changes and then move to a different part of the file.  Also,
       you cannot insert or delete bytes, only change them.

OPTIONS

	-L, --license	Display license information for vbindiff
	-V, --version	Display the version number
	    --help	Display help information

BUGS

       Does not work properly with files over 4 gigabytes.  It should be able to view the first 4 gigabytes ok, but the display only has room for
       8 hex digits of file position, and the Goto box is also limited to 8 digits.

LICENSE

       VBinDiff is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the
       Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       VBinDiff is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
       or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with VBinDiff (see the file COPYING); if not, write to the Free
       Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

AUTHOR

       Christopher J. Madsen <vbindiff .at. cjmweb.net> <http://www.cjmweb.net/vbindiff/>

VBinDiff 3.0_beta3						    2008-06-25							       VBINDIFF(1)
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