V7/usr/man/man1/ln.1

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.TH LN 1 
.SH NAME
ln  \-  make a link
.SH SYNOPSIS
.B ln
name1 [ name2 ]
.SH DESCRIPTION
A link is a directory entry referring
to a file; the same file (together with
its size, all its protection
information, etc.)
may have several links to it.
There is no way to distinguish a link to a file
from its original directory entry;
any changes in the
file are effective
independently of the name by which the file is known.
.PP
.I Ln
creates a link to an existing file
.IR name1 .
If
.I name2
is given, the link has that name;
otherwise it is placed in the current directory
and its name is the last component
of
.IR name1 .
.PP
It is forbidden to link to a directory
or to link across file systems.
.SH "SEE ALSO"
rm(1)