The SHUTDOWN command / The SETBOOT command

Use the command SHUTDOWN to perform a system shutdown from the command 
line or a batch or REXX program. SHUTDOWN needs no parameter. 
You can also use the command 

<SETBOOT /IBD:x

where x is the drive you want to boot from next or a non-existing drive if 
you do not want to reboot the PC. 

The difference between them: 

Using SHUTDOWN OS/2 pops up a warning dialog for every open DOS or OS/2 
session, whereas <SETBOOT closes all DOS, Windows and OS/2 applications 
without any prompting. 

Beginning with Fixpack #6 for WARP 4 there is another program to perform a 
system shutdown from the command line: TSHUTDWN.EXE. 

TSHUTDWN.EXE does a normal system shutdown without pop up dialogs for OS/2 
or DOS sessions. Note that you must unpack TSHUTDWN.EXE manually using the 
command 

 
   unpack TSHUTDWN.EX_

if you don't have a machine with WarpSpace on Demand. The file 
TSHUTDWN.EX_ is in the fixpack directory \OS2.3. 

According to a note from Armin Schwarz (see EMail Addresses) there are 
some restrictions using TSHUTDWN.EXE: 

"The readme of Warp4 FP8 says to use /N to eliminate any prompts when 
shutting down. I found no difference between using /N or not using that 
option. 

TSHUTDWN does shut down OS/2 window, DOS and seamless WIN-OS2 window 
sessions without prompting. BUT IT WILL PROMPT TO CLOSE A FULLSCREEN OS/2 
SESSION. 

TSHUTDWN must be used on a Warp 4 FP8 system. IT WILL NOT SHUTDOWN WITHOUT 
PROMPTING ON ANY OTHER WARP 3 OR 4 SYSTEMS. In other words, TSHUTDWN works 
just like SHUTDOWN on Warp 3 and Warp 4 (pre FP6). "