Jungsub Shin: > Do you mean using symlinks or bind mount to reduce length of mount > options?? I can remove "~/tca_agent/image_layer_dir" string. But the > other character means unique ID of layer and i can't compress it or > replace it to another string. This is not fundamental solution. Docker=20 Can't it be a solution? # mount -o bind /long/path0 /br0 # mount -o bind /long/path1 /br1 ::: # mount -t aufs -o br=/br0:/br1:... none /mntpnt or # ln -s /long/path0 /br0 # ln -s /long/path1 /br1 ::: # mount -t aufs -o br=/br0:/br1:... none /mntpnt J. R. Okajima