I tested the command in terminal: sh /opt/dropcache-mdn/bin/dropcache.sh --2 /opt/dropcache-mdn/bin/dropcache.sh: line36: can't create /proc/sys/vm/drop_caches: permission denied
$ devel-su Password: BusyBox v1.20.0.git (MeeGo 3:1.20-0.2+0m8) buil t-in shell (ash) Enter 'help' for a list of built-in commands. ~ # sh /opt/dropcache-mdn/bin/dropcache.sh --3 ~ #