[Haskell] system command

Hi, I am newbie in Haskell programing and need to launch a shell command through a Haskell code. In other programing languages like C or Java I know how carry out this task; for instance the code system("ls -l ") in C or exec("ls -l") in Java work fine and lists the working directory. I know that in interactive mode the Haskell command :! ls -l is similar, but ¿It is possible something like in Haskell non-interactive mode? Thaks in advance. Helptex23