public static Configuration unix() {
    return UnixHolder.UNIX;
  }
Returns the default configuration for a UNIX-like file system. A file system created with this
configuration:

<ul>
  <li>uses {@code /} as the path name separator (see {@link PathType#unix()} for more
      information on the path format)
  <li>has root {@code /} and working directory {@code /work}
  <li>performs case-sensitive file lookup
  <li>supports only the {@linkplain BasicFileAttributeView basic} file attribute view, to avoid
      overhead for unneeded attributes
  <li>supports hard links, symbolic links, {@link SecureDirectoryStream} and {@link
      FileChannel}
</ul>

<p>To create a modified version of this configuration, such as to include the full set of UNIX
file attribute views, {@linkplain #toBuilder() create a builder}.

<p>Example:

<pre>
  Configuration config = Configuration.unix().toBuilder()
      .setAttributeViews("basic", "owner", "posix", "unix")
      .setWorkingDirectory("/home/user")
      .build();  </pre>
jimfs/src/main/java/com/google/common/jimfs/Configuration.java