●●● ●●●● 2.1 Operating System Services :9 s ●● ●●●● File-system manipulation o read and write files and directories create and delete search permission management Communications o Processes may exchange information on the same com puteror between com puters over a network Communications may be via shared memory or through message passing(packets moved by the os)6 2.1 Operating System Services ⚫ File-system manipulation ⚫ read and write files and directories ⚫ create and delete ⚫ search ⚫ List ⚫ permission management ⚫ Communications ⚫ Processes may exchange information, on the same computer or between computers over a network ⚫ Communications may be via shared memory or through message passing (packets moved by the OS)