ln file1 file2
that makes it so the contents of file1 are the same as of file2, and if you change the contents of 1, the other
changes accordingly.
I can slo do this
ln -s file1 files
which is somewhat similar, but of course works over file systems and file2 is really just a symbolic link to file1.
Anyway, sometimes I want to undo what I did, but I can't say
unlink file2
because that will remove file2. I just want it , so that the files are still the same but if I change one, the other will
not change (i.e., inodes are different but diff shows no differences). I can't see any flags for ln. Anyone have
any idea? I know it can be fudged like
sed -i 's/ / /g' file1
but this is kind of fudging, and it may not work on binary files.
another question. If you have a file FILE1 can you find everything that is linked
to it? say you have
ln -s /this/is/filesystem/1/FILE1 /filesystem/2/FILE2
given FILE1 can you find FILE2? It is pretty easy the other way around (readlink FILE2) but that does
not work for FILE1. Also if "ln" instead of "ln -s" you cannot do it.
I guess you could do ls -i /this/is/filesystem/1/FILE1, get the inum and then do a
find / -type f -inum x # Whatever the inum is
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