To use any command it must be on your path, if not you must give the exact path of the command to exececute it. For example, if /usr/bin is not on your path, even you type ls command it will not work, even your current directory is /usr/bin, it will not work. use command "locate cardctl " if it is there already, if not use "locate -u" as root to update the database, then issue the first command. If it is still not there, you have not got the program installed yet.
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