sed problem

[Hans Müller]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

I have this sting: "/Linux/update" and I must substitute it to "\/Linux\/update"
I tryed echo "/Linux/update"|sed "s/\//\\\//g" but it fails.
have someone any ideas??
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2.2 (GNU/Linux)
Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org
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=vlqc
-----END PGP SIGNATURE-----