code: def isInstalled(value):
  		
  
  		function = """
  		function is_installed {
  		  local return_=1;
  		  type $1 >/dev/null 2>&1 || { local return_=0; };
  		  echo "$return_";
  		}"""
  		command = """bash -c '{f}; echo $(is_installed \"{arg}\")'""".format(f = function, arg=value)
  		cmd = CommandHelper(command)
  		cmd.execute()
  
  		return "1" in cmd.output
docs: Check if a software is installed into machine.
  
  		Args:
  			value (str): Software's name
  
  		Returns:
  			bool: True if the software is installed. False else