You can quote an absolute file name to prevent special
characters and syntax in it from having their special effects.
The way to do this is to add `/:' at the beginning.
For example, you can quote a local file name which appears remote, to
prevent it from being treated as a remote file name. Thus, if you have
a directory named `/foo:' and a file named `bar' in it, you
can refer to that file in Emacs as `/:/foo:/bar'.
`/:' can also prevent `~' from being treated as a special
character for a user's home directory. For example, `/:/tmp/~hack'
refers to a file whose name is `~hack' in directory `/tmp'.
Likewise, quoting with `/:' is one way to enter in the minibuffer
a file name that contains `$'. However, the `/:' must be at
the beginning of the buffer in order to quote `$'.
You can also quote wildcard characters with `/:', for visiting.
For example, `/:/tmp/foo*bar' visits the file `/tmp/foo*bar'.
However, in most cases you can simply type the wildcard characters for
themselves. For example, if the only file name in `/tmp' that
starts with `foo' and ends with `bar' is `foo*bar', then
specifying `/tmp/foo*bar' will visit just `/tmp/foo*bar'.