Taw qhia: UNIX yog ib qhov nyiam tuaj thiab txhim khu kev qha OS. Li ntawd, UNIX yog ib qho tseem ceeb heev rau cov developers. Qhia tshwj xeeb uas, Kawm cov commands thiab tswvyim ntawm tus UNIX OS yog ib qho tseem ceeb heev. Hauv no koob, Peb twb sim…