how to tar with a prefix directory [closed]

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I want to tar the directory /opt/mydir into a directory /opt/myprefix/mydir

how can I do that with tar command? (solaris)

thanks

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Create a symlink so that you can access /opt/mydir as /opt/myprefix/mydir

cd /opt
ln -s . myprefix

Then tar it:

tar -cvf mytar.tar /opt/myprefix/mydir