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Full Discussion: Hard Link vs SOft Link????
Top Forums UNIX for Dummies Questions & Answers Hard Link vs SOft Link???? Post 302200573 by bathija on Thursday 29th of May 2008 12:38:56 PM
Old 05-29-2008
hard lick-- used in cases when you want the link to be in the same file system. In this case the inode for both link and the file is the same. If you want to move the shardlink to another location or you want to move the original file, it does not affect either of them.

command is ln "file name" "link"

this can not be used on directories. and can be used only in the same fS and not outside file systems

Soft links: used when you want a temporary link. ths inode values are different here for link and the file.
this can be both for file and directories.
If the source file gets deleted the link will be removed at next reboot
. This can extend across file systems

command is ---ln -s "file" "link"

please reverrt if you have any qureries.
 

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LEARN ABOUT SUNOS

unlink

link(1M)						  System Administration Commands						  link(1M)

NAME

       link, unlink - link and unlink files and directories

SYNOPSIS

       /usr/sbin/link  existing-file new-file

       /usr/xpg4/bin/link  existing-file new-file

       /usr/sbin/unlink  file

DESCRIPTION

       The link and unlink commands link and unlink files and directories. Only super-users can use these commands on directories.

       Use  link  to  create  a new file that points to an existing file. The  existing-file and  new-file operands  specify the existing file and
       newly-created files.  See OPERANDS.

       link and  unlink directly invoke the link(2) and unlink(2) system calls, performing exactly what they are told to  do  and  abandoning  all
       error checking. This differs from the  ln(1) command. See  ln(1).

       While linked files and directories can be removed using unlink, it is safer to use rm(1) and rmdir(1) instead. See  rm(1) and  rmdir(1).

   /usr/xpg4/bin/link
       If  the	existing  file being hard linked is itself a symbolic link, then the newly created file (new-file) will be a hard link to the file
       referenced by the symbolic link, not to the symbolic link object itself (existing-file).

OPERANDS

       The following operands are supported:

       existing-file   Specifies the name of the existing file to be linked.

       file	       Specifies the name of the file to be unlinked.

       new-file        Specifies the name of newly created (linked) file.

ENVIRONMENT VARIABLES

       See  environ(5) for descriptions of the following environment variables that affect the execution of  link: LANG, LC_ALL, LC_CTYPE, LC_MES-
       SAGES, and NLSPATH.

ATTRIBUTES

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

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

   /usr/xpg4/bin/link
       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWxcu4			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ln(1), rm(1), link(2), unlink(2), attributes(5), environ(5), standards(5)

SunOS 5.10							    9 Oct 2002								  link(1M)
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