Is there a quick git command to see an old version of a file?

Is there a command in git to see (either dumped to stdout, or in $PAGER or $EDITOR) a particular version of a particular file?

From stackoverflow

• You can use git show:

  $ git show REVISION:path/to/file
  

  For example, to show the 4th last commit of the file src/main.c, use:

  $ git show HEAD~4:src/main.c
  

  For more information, check out the man page for git-show.

  mike : That doesn't actually seem to work -- did you try it? For "git show HEAD:path/to/file.c", I get an "ambiguous argument" error.

  mike : And if I just do "git-show path/to/file.c", the command succeeds with no output.

  mipadi : Yeah, I tried it out -- it worked for me.

  Dustin : With what version of git? The other way to do it is with git cat-file given the blob ID (which you can find with ls-tree, but that's the hard way).

  mike : git version 1.5.6.3

  rq : Has to be the complete path, from the top of the git repo

  Matt McMinn : If you're on windows, it might be a path separator thing; if I do git show HEAD:dir\subdir\file, I get the anbiguous argument. If I do git show HEAD:dir/subdir/file, it works as expected.

• The path you must provide after the : is from the root of the git repository.