lyr ==== an abbreviation of "layer." maintains a repository of overlayfs upper directories, work directories, and mount paths at LYRREPO. simplifies mounting, unmounting, creating, and deleting layers. 62 ELOC. usage: lyr.sh [command] commands: workdir returns the work directory path for the layer. upperdir returns the upper directory path for the layer. mountdir returns the mount directory path for the layer. mk create a new layer with the given name. rm unmount and delete the layer with the given name. up [[:]] mount the given layer with the given lower paths. print the mount path. dn unmount the given layer.