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Top Forums Shell Programming and Scripting Newbie question: if[command not null] Post 302512136 by DGPickett on Friday 8th of April 2011 12:35:06 PM
Old 04-08-2011
Contents of paths, that means all (dir, file, link, device, FIFO) entry names in the subtree, permissions, flat file contents, link counts, modified dates, access dates -- well, they are probably never the same unless you can access both trees identically in each second. Diff two dirs does some of this. ls goes in alpha order, if I remember the man page right. You can always sort. find might be better than ls, providing relative paths of every entry name. cmp can compare file contents, even if binary, one file at a time. So, the first trick is good requirement writing! Smilie
 

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link(1) 						      General Commands Manual							   link(1)

NAME
link, unlink - Creates an additional directory entry for an existing file SYNOPSIS
link file1 file2 unlink file STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: link: XCU5.0 unlink: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. DESCRIPTION
The link command performs the link() system call to create an additional directory entry for an existing file, file1. In effect, the underlying file then has two names, file1 and file2 (either of these arguments can be a pathname). The old and new entries share equal access rights to the underlying file. The unlink command performs the unlink() system call to remove a link to file created by link. The unlink command removes the directory entry specified by the file parameter and, if the entry is a hard link, decrements the link count of the file referenced by the link. You should be familiar with the link() and unlink() system calls before you use these commands. The link and unlink commands do not issue error messages when the associated system call is unsuccessful. NOTES
The link and unlink commands cannot be used to link and unlink directories. EXIT STATUS
The link and unlink commands both exit with the following: The link() or unlink() system call succeeded. Too few or too many arguments specified. The link() or unlink() system call failed. SEE ALSO
Commands: fsck(8), ln(1) Functions: link(2), unlink(2) link(1)
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