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Top Forums UNIX for Dummies Questions & Answers need some info about symbolic link and hard link Post 302156427 by detective linux on Tuesday 8th of January 2008 06:04:51 AM
Old 01-08-2008
need some info about symbolic link and hard link

hello folks
how y'all doin


well i have some questions about symbolic link and hard link

hope some one answer me

i open terminal and join as root
and i wrote ln -s blah blah
then i wrote ls
i see red file called blah blah
but didn't understand what is this can some one explain and is this the way to read it ?

what if remove the orginal file of hard link can i still see the content of the file

and can i try to make a hard link to a directory ? To a non-existent file

another more questions hope not one get angry coze i ask much

what if i try to change the permissions of the original file with chmod, or update its modification time with touch is there is something gunna happen for the links

that's what i wanna to know

thanks for all people who's gonna see the topic and thanks for who's gonna answer my questions
 

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ln(1)							      General Commands Manual							     ln(1)

Name
       ln - link to a file

Syntax
       ln [ -f ] [ -i ] [ -s ] name1 [name2]
       ln [ -f ] [ -i ] [ -s ] name ... directory

Description
       A  link is a directory entry referring to a file.  A file, together with its size and all its protection information may have several links
       to it.  There are two kinds of links: hard links and symbolic links.

       By default makes hard links.  A hard link to a file is indistinguishable from the original directory entry.  Any  changes  to  a  file  are
       effective independent of the name used to reference the file.  Hard links may not span file systems and may not refer to directories.

       Given  one or two arguments, creates a link to an existing file name1.  If name2 is given, the link has that name.  The name2 may also be a
       directory in which to place the link.  Otherwise it is placed in the current directory.	If only the directory is specified,  the  link	is
       made to the last component of name1.

       Given  more  than two arguments, makes links to all the named files in the named directory.  The links made have the same name as the files
       being linked to.

Options
       -f   Forces existing destination pathnames to be removed before linking without prompting for confirmation.

       -i   Write a prompt to standard output requesting information for each link that would overwrite an existing file.  If  the  response  from
	    standard input is affirmative, and if permissions allow, the link is done. The -i option has this effect even if the standard input is
	    not a terminal.

       -s   Creates a symbolic link.

	    A symbolic link contains the name of the file to which it is linked.  The referenced file is used when an operation  is  performed	on
	    the  link.	 A  on a symbolic link returns the linked-to file.  An must be done to obtain information about the link.  The call may be
	    used to read the contents of a symbolic link.  Symbolic links may span file systems and may refer to directories.

See Also
       cp(1), mv(1), rm(1), link(2), readlink(2), stat(2), symlink(2)

																	     ln(1)
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