===== bash: "How To" ... running commands =====
^operation^what^code^
|execution|result of command execution|RSLT=$?|
|:::|being root|if ($(id -u) -eq 0))|
|:::|execute command in variable "__CMD__" \\ e.g. to programatically run same command  \\  either on localhost or via added ssh prefix|__CMD__="command parameter ..."  \\ eval $__CMD__|

//work in progress//