What my puzzle file!, How to remove special characters ?? Post: 302790239

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Top Forums UNIX for Advanced & Expert Users What my puzzle file!, How to remove special characters ?? Post 302790239 by Don Cragun on Friday 5th of April 2013 03:38:46 AM

04-05-2013

Registered User

Quote:

Originally Posted by bakunin

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

Sorry, but no. UNIX text files do not have an End-of-File character. Each line in a text file is terminated by a <newline> character. If you have a file open in vi and issue the commands:

Code:

:1,$d
:w file

(which deletes all lines in the file), the size of file will be 0 bytes.

If you have exactly one line in a file and you edit it with vi and delete all of the characters on the line by repeatedly executing the x command until the line is empty and then issue the command:
:w file
then the size of file will be 1 byte because you didn't delete the line, you just deleted the characters on the line preceding the terminating <newline> character.

The current line (including the terminating <newline> character can also be deleted in vi with the dd command.

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LEARN ABOUT SUNOS

gnome-character-map

gnome-character-map(1)						   User Commands					    gnome-character-map(1)

NAME

       gnome-character-map, gucharmap - insert special characters into a document

SYNOPSIS

       gnome-character-map [--font=string]

DESCRIPTION

       The  Character Map application enables you to select characters from a character table, then combine the characters into a text string with
       standard characters. You can insert the text string that you create into other applications, such as text editor documents.

       Character Map provides accented characters, mathematical symbols, special symbols, and punctuation marks. Many of the  characters  are  not
       available on a standard keyboard.

OPTIONS

       The following options are supported:

       --font=string   Specify	the font name and point size that you want to use to display the characters in the character table, when you start
		       Character Map.

EXAMPLES

       Example 1: Launching Character Map

       example% gnome-character-map

       Example 2: Launching Character Map With Specified Font Name and Point Size

       example% gnome-character-map --font="bitstream vera sans italic 20"

EXIT STATUS

       The following exit values are returned:

       0	Application exited successfully

       >0	Application exited with failure

FILES

       The following files are used by this application:

       /usr/bin/gnome-character-map    Executable for Character Map.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgnome-character-map	   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |External			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       Character Map Manual

       Latest version of the GNOME Desktop User Guide for your platform.

NOTES

       Written by Glynn Foster, Sun Microsystems  Inc., 2003.

SunOS 5.10							    20 Jan 2004 					    gnome-character-map(1)