OS-9 vs. Unix commands This table lists the most common Unix/Linux commands with their OS-9 counterpart. OS-9 is the operating system on which CD-i's operating environment CD-RTOS was based. An OS-9 command shell is also used in CD-i development. Unix/Linux   OS-9         Description ls dir Overview of files in a directory rm del Erase files cp copy Copy files cat list List files cd chd Change data directory mkdir makdir Create new directory rmdir deldir Remove directory pwd pd Show current data directory jobs procs Show active processes kill kill Kill active process fg w/wait Select active process chmod attr Change file attributes and access rights sz/rz/rx kermit Send and receive files ed edt Very limited line-based editor vi/pico umacs Extended full-screen editor man help Displays information about a command set set Set environment variables .profile .login Procedure file that is executed at login logout logout Close active user shell

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