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    I remember that double slash to allow remote file system access in an early system V implementation (Utek V & DFS). The syntax was //servername/path. Just like Solaris automounter would use now /net/servername/path. Commented Apr 29, 2011 at 9:39
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    Linux doesn't do anything about //, it's bash. Commented Apr 29, 2011 at 10:11
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    @jlliagre: I remember that from AT&T RFS. (Remote File System) Was in System V. Commented Nov 8, 2011 at 11:52
  • Python's posixpath.normpath() function also retains double leading slashes. I tried to find out why, which brought me here. It's unfortunate that it does this, because what I've read indicates that double leading slashes is no longer important. Commented Jul 8, 2016 at 20:42