opkg: opkg must have one sub-command argument
opkg version 0.1.7
usage: opkg [options...] sub-command [arguments...]
where sub-command is one of:

Package Manipulation:
        update                  Update list of available packages
        upgrade                 Upgrade installed packages
        install <pkgs>          Install package(s)
        configure <pkgs>        Configure unpacked package(s)
        remove <pkgs|regexp>    Remove package(s)
        flag <flag> <pkgs>      Flag package(s)
         <flag>=hold|noprune|user|ok|installed|unpacked (one per invocation)

Informational Commands:
        list                    List available packages
        list-installed          List installed packages
        list-upgradable         List installed and upgradable packages
        files <pkg>             List files belonging to <pkg>
        search <file|regexp>    List package providing <file>
        info [pkg|regexp]       Display all info for <pkg>
        status [pkg|regexp]     Display all status for <pkg>
        download <pkg>          Download <pkg> to current directory
        compare-versions <v1> <op> <v2>
                            compare versions using <= < > >= = << >>
        print-architecture      List installable package architectures
        whatdepends [-A] [pkgname|pat]+
        whatdependsrec [-A] [pkgname|pat]+
        whatprovides [-A] [pkgname|pat]+
        whatconflicts [-A] [pkgname|pat]+
        whatreplaces [-A] [pkgname|pat]+

Options:
        -A                      Query all packages not just those installed
        -V <level>              Set verbosity level to <level>.
        --verbosity <level>     Verbosity levels:
                                        0 errors only
                                        1 normal messages (default)
                                        2 informative messages
                                        3 debug
                                        4 debug level 2
        -f <conf_file>       
   Use <conf_file> as the opkg configuration file
        --conf <conf_file>      Default configuration file location
                                is /etc/opkg/opkg.conf
        --cache <directory>     Use a package cache
        -d <dest_name>          Use <dest_name> as the the root directory for
        --dest <dest_name>      package installation, removal, upgrading.
                                <dest_name> should be a defined dest name from
                                the configuration file, (but can also be a
                                directory name in a pinch).
        -o <dir>                Use <dir> as the root directory for
        --offline-root <dir>    offline installation of packages.
        --offline-path <path>   $PATH for postinsts scripts in offline mode

Force Options:
        --force-depends         Install/remove despite failed dependences
        --force-defaults        Use default options for questions asked by opkg
        --force-reinstall       Reinstall package(s)
        --force-overwrite       Overwrite files from other package(s)
        --force-downgrade       Allow opkg to downgrade packages
        --force-space           Disable free space checks
        --noaction              No action -- test only
        --nodeps                Do not follow dependences
        --force-removal-of-dependent-packages
                                Remove package and all dependencies
        --autoremove            Remove packages that were installed
                                automatically to satisfy dependencies
        -t                      Specify tmp-dir.
        --tmp-dir               Specify tmp-dir.

 regexp could be something like 'pkgname*' '*file*' or similar
 e.g. opkg info 'libstd*' or opkg search '*libop*' or opkg remove 'libncur*'
root@bm750:~#
-------------------- < Script > ----------------------------
df -m > /tmp/meminfo.dcc; echo ">>> DONE <<<";

>>> DONE <<<