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Full Discussion: What my puzzle file!, How to remove special characters ??
Top Forums UNIX for Advanced & Expert Users What my puzzle file!, How to remove special characters ?? Post 302790197 by bakunin on Friday 5th of April 2013 01:47:51 AM
Old 04-05-2013
Quote:
Originally Posted by arm_naja
-- After remove it by vi (I press x for 3 times because it have 3 char right?) --
Code:
root@MyHost /tmp> wc puzzle.txt
       1       0       1 puzzle.txt
root@MyHost /tmp> cat -v puzzle.txt

root@MyHost /tmp> ls -l puzzle.txt
-rw-r--r--    1 root     system            1 Mar 28 10:55 puzzle.txt
root@MyHost /tmp>

How I remove special chars???
The short answer is: you can't The single char "ls" shows is the End-of-File-character (literally a "^D") and it isn't possible with "vi" to delete it. In fact "vi" will even append such a EOF char to a file if it was missing.

Generate a file with "touch", it will have 0 characters. Now open this in "vi", write some text, delete it completely (this way "vi" thinks you have changed the file, do NOT use the undo-function) and save the file. You will notice that it has also 1 character in it - the EOF char.

I hope this helps.

bakunin
 

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LEARN ABOUT DEBIAN

labelit_hsfs

labelit_hsfs(1M)					  System Administration Commands					  labelit_hsfs(1M)

NAME

       labelit_hsfs - provide and print labels for hsfs file systems

SYNOPSIS

       /usr/sbin/labelit -F hsfs [generic_options] [-o specific_options] special

DESCRIPTION

       labelit can be used to provide labels for unmounted CD-ROM images (CD-ROMs may not be labeled, as they are read-only media).

       generic_options are options supported by the generic  labelit command.

       If no specific_options are specified, labelit prints the current value of all label fields.

       The special name should be the physical disk section (for example, /dev/dsk/c0d0s6).

OPTIONS

       -o	Use one or more of the following  name=value pairs separated by commas (with no intervening spaces) to specify values for specific
		label fields. According to the ISO 9660 specification, only certain sets of characters may be used to fill in these labels.  Thus,
		``d-characters''  below  refers to the characters `A' through `Z', the digits `0' through `9', and the `_' (underscore) character.
		``a-characters'' below refers to `A' through `Z', `0' through `9', space, and the following characters: !"%&'()*+,-./:;<=>?_.

		absfile=	Abstract file identifier, d-characters, 37 characters maximum.

		applid= 	Application identifier, d-characters, 128 characters maximum.

		bibfile=	Bibliographic file identifier, d-characters, 37 characters maximum.

		copyfile=	Copyright file identifier, d-characters, 128 maximum.

		prepid= 	Data preparer identifier, d-characters, 128 maximum.

		pubid=		Publisher identifier, d-characters, 128 maximum.

		sysid=		System identifier, a-characters, 32 maximum.

		volid=		Volume identifier, d-characters, 32 maximum.

		volsetid=	Volume set identifier, d-characters, 128 maximum.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       labelit(1M), volcopy(1M), attributes(5)

SunOS 5.10							    20 Mar 1992 						  labelit_hsfs(1M)
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