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OS/2 Message File | 1996-04-17 | 28KB | 594 lines

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HDisplay the internal commands, or prompt for a command.
execute another command.
Usage:  ? ["prompt text" command]
If no prompt text or command is given, ? displays a list of
internal commands.  If the prompt text or command is included,
? prompts before executing the specified command.
HLoad or display the alias list, or define an alias.
Usage:  ALIAS [/P] [/R [d:][path]filename...] [name[=][value]]
    /P  Pause after displaying each page
    /R  Load an alias list from a file
HChange the file or subdirectory attributes.
Usage:  ATTRIB [/A:[[-]rhsda] /D /P /Q /S -|+[AHRS]] [d:][path]filename...
    /A: Select files by attributes
    /D  Modify subdirectory attributes
    /P  Pause after displaying each page
    /Q  Quiet mode
    /S  Modify files in subdirectories
    +A  Set archive attribute      -A  Clear archive attribute
    +H  Set hidden attribute       -H  Clear hidden attribute
    +R  Set read-only attribute    -R  Clear read-only attribute
    +S  Set system attribute       -S  Clear system attribute
HBeep the speaker.
Usage:  BEEP [frequency [duration] ...]
The frequency is specified in Hertz, and the duration in 1/18th second
intervals.  No sound will be generated for frequencies less than 37 Hz,
allowing you to insert short delays.  The default value for frequency is
440 Hz; the default value for duration is 2.
HCall a secondary batch file.
Usage:  CALL [d:][path]filename
HTerminate all batch processing.
Usage:  CANCEL [value]
If you enter a value, CANCEL will set the ERRORLEVEL to that value.
HDisplay or change the current directory.
Usage:  CD [- | [d:][pathname]
Entering CD with no argument or only a drive name will display the current
directory.  Entering CD and a pathname will change the current directory.
You can switch to the previous directory by entering CD -.
HChange the current disk drive and directory.
Usage:  CDD [- | d:]pathname
You can switch to the previous drive and directory by entering CDD -.
HDisplay or change the current system code page.
Usage:  CHCP [n]
    n  New code page
Entering CHCP with no argument displays the active code page.
HDisplay or change the current directory.
Usage:  CHDIR [[d:][pathname]
Entering CHDIR with no argument or only a drive name will display the current
directory.  Entering CHDIR and a pathname will change the current directory.
You can switch to the previous directory by entering CHDIR -.
HClear display, optionally to the specified colors.
Usage:  CLS [[BRIght] [BLInk] fg ON bg [BORder bc]]
    fg  Foreground color
    bg  Background color
    bc  Border color
Valid colors are Black, Blue, Green, Red, Magenta, Cyan, Yellow, and White.
HSet the screen display colors.
Usage:  COLOR [[BRIght] [BLInk] fg ON bg [BORder bc]]
    fg  Foreground color
    bg  Background color
    bc  Border color
Valid colors are Black, Blue, Green, Red, Magenta, Cyan, Yellow, and White.
HCopy or append one or more files.
Usage:  COPY [d:][path]source[+]...[/A /B] [[d:][path]target]
             [/A:[[-]rhsda] /A /B /C /F /M /N /P /Q /R /S /T /U /V]
    /A  Copy in ASCII mode
    /A: Select files by attributes
    /B  Copy in binary mode
    /C  Copy only those files where the target is older than the source
    /F  Fail if the source file has extended attributes and the target file
          system doesn't support extended attributes.
    /H  Copy hidden and system files too
    /M  Copy only those files with the archive bit set
    /N  Don't actually perform the copy
    /P  Confirm each file copy (Y or N)
    /Q  Don't display filenames or totals
    /R  Prompt before overwriting an existing file
    /S  Copy subdirectories
    /T  Only display totals (no filenames)
    /U  Copy only those source files that are newer than a matching target
          file, or where a matching target file doesn't exist
    /V  Verify disk writes
HDisplay and (optionally) change the system date.
Usage:  DATE [mm-dd-yy]
    mm  Month (1 - 12)
    dd  Day (1 - 31)
    yy  Year (80 - 199 or 1980 - 2099)
If you don't enter a date, 4OS2 will display the current date and prompt for
a new one.  The format for the date entry depends on the country code.  U.S.
format is mm-dd-yy; European format is dd-mm-yy; Japanese is yy-mm-dd.
HErase the specified file(s) from the disk.
Usage:  DEL [/A:[[-]rhsda] /F /N /P /Q /S /T /X /Y /Z] [d:][path]filename...
    /A: Select files by attributes
    /F  (4OS2/32 only) Don't copy the file(s) to the DELDIR directory
    /N  Don't actually delete the file(s)
    /P  Confirm deletion for each file (Y or N)
    /Q  Don't display filenames or totals
    /S  Delete matching files in the subdirectories
    /T  Display totals only
    /X  Remove empty subdirectories after deleting (use with /S)
    /Y  The reverse of /P - it assumes a Y response to everything
    /Z  Delete all files, including read-only, hidden and system files
HPause for a specified period of time.
Usage:  DELAY [n]
    n  The number of seconds to pause.  The default value is 1 second.
HCreate, modify, or delete file and subdirectory descriptions.
Usage:  DESCRIBE [/A:[[-]rhsda]] [d:][path]filename... ["description"]
    /A: Select files by attributes
You can enter a description on the command line by entering the filename
followed by the description enclosed in quotes.  If you don't enter a
description, DESCRIBE will prompt you for one for each matching filename.
HStart an OS/2 program in detached mode.
Usage:  DETACH [d:][filename[.ext]]
HDisplay information about files and subdirectories.
Usage:  DIR [/1 /2 /4 /A[:-rhsda] /B /D /E /F /H /I"text" /J /K /L /M /N
            /O:-deginrsu /P /R /S /T /U /V /W /Z] [[d:][path]filename...]
    /1  One column                      /M  Suppress footers
    /2  Two columns                     /N  Display FAT volume in HPFS format
    /4  Four columns                    /O  Sort order
    /A  Select files by attributes      /P  Pause after each page
    /B  Display filenames only          /R  Disable description wrapping
    /D  Disable colorization            /S  Display subdirectories
    /E  Upper case filenames            /T  Display attributes
    /F  Display expanded filenames      /T:acw  Date / time type
    /H  Hide "." and ".."               /U  Summaries only
    /I  Match descriptions              /V  Sort filenames vertically
    /J  Justify filenames               /W  Wide display
    /K  Suppress headers                /Z  Display HPFS volume in FAT format
    /L  Lower case filenames
HDisplay the directory stack used by PUSHD and POPD.
Usage:  DIRS
HCreate loops in batch files.
Usage:  DO [n | FOREVER]
        DO var = start TO end [BY n]
        DO [WHILE | UNTIL] condition
        ...
        [ITERATE]
        [LEAVE]
        ...
        ENDDO
HTells applications where to search for their files.
Usage:  DPATH [[d:]path][[;[d:]path]...]]
        DPATH ;
If you enter DPATH with no parameters, 4OS2 displays the current search
path.  If you enter DPATH and a semicolon, 4OS2 clears the search path.
HDraw a box on the screen.
Usage:  DRAWBOX ulrow ulcol lrrow lrcol style [BRIght][BLInk] fg ON [BRI] bg
                [FILL [BRIght] bgfill] [ZOOm] [SHAdow]
    ulrow   Row for upper left corner
    ulcol   Column for upper left corner
    lrrow   Row for lower right corner
    lrcol   Column for lower right corner
    style   Box drawing style (0 - 4)
    fg      Foreground color
    bg      Background color
    bgfill  Background fill color (for the inside of the box)
    ZOOM    Box zooms to its final size
    SHADOW  Include a drop shadow
Valid colors are Black, Blue, Green, Red, Magenta, Cyan, Yellow, and White.
HDraw a horizontal line on the screen.
Usage:  DRAWHLINE row column length style [BRIght] [BLInk] fg ON [BRI] bg
    row     Start row
    column  Start column
    length  Length of line
    style   Line drawing style (1 or 2)
    fg      Foreground color
    bg      Background color
Valid colors are Black, Blue, Green, Red, Magenta, Cyan, Yellow, and White.
HDraw a vertical line on the screen.
Usage:  DRAWVLINE row column length style [BRIght] [BLInk] fg ON [BRI] bg
    row     Start row
    column  Start column
    length  Length of line
    style   Line drawing style (1 or 2)
    fg      Foreground color
    bg      Background color
Valid colors are Black, Blue, Green, Red, Magenta, Cyan, Yellow, and White.
HDisplay the echo status, enable or disable batch file or command line
echoing, or display a message.
Usage:  ECHO [on | off | message]
ECHO defaults to ON in batch files and OFF during keyboard input.
If no arguments are entered, ECHO displays the current echo state.
HDisplay a message, without printing a trailing CR/LF.
Usage:  ECHOS message
HRestore the disk drive, directory, and environment saved by SETLOCAL.
Usage:  ENDLOCAL
HErase the specified file(s) from the disk.
Usage:  ERASE [/A:[[-]rhsda] /F /N /P /Q /S /T /X /Y /Z] [d:][path]filename...
    /A: Select files by attributes
    /F  (4OS2/32 only) Don't make copies of the file(s) in the DELDIR
        directory
    /N  Don't actually delete the file(s)
    /P  Confirm deletion for each file (Y or N)
    /Q  Don't display filenames or totals
    /S  Delete matching files in the subdirectories
    /T  Only display totals (no filenames)
    /X  Remove empty subdirectories after deleting (use with /S)
    /Y  The reverse of /P - it assumes a Y response to everything
    /Z  Delete all files, including read-only, hidden and system files
HEdit environment variables and/or aliases.
Usage:  ESET [/A] varname...
    /A  Assume the argument is an alias
ESET will search for environment variables first, and then aliases.
HPerform a command, except on the file(s) specified.
Usage:  EXCEPT ([d:][path]filename...) command
HExit the current command processor.
Usage:  EXIT [value]
If you specify a value, EXIT will return that value to the parent process.
If you EXIT from a primary command processor, you will be returned to PM.
HFind files or text.
Usage:  FFIND [/A[[:][-]rhsda] /B /C /D[list] /E /K /L /M
               /O[[:][-]acdeginrsu] /P /S /[T|X]"xx" /V file...
    /A        Select files by attribute
    /B        Bare output
    /C        Case sensitive search
    /D        Drive or drive list
    /E        Upper case display
    /K        No headers
    /L        Line numbers
    /M        No footers
    /O        Sort order
    /P        Pause after each page
    /S        Subdirectories
    /T"xx"    Text search string
    /V        Verbose, show all matching lines
    /X["xx"]  Hex display / search string
HRepeat a command for several variables.
Usage:  FOR [/A:[-[rhsda]] /H %%var IN (set) [DO] command
    /A  Retrieve files with the specified attribute(s)
    /H  Hide "." and ".."
If a filename in (set) begins with an @, "var" will be set sequentially to
each line in the file.
HDisplay the total disk space, total bytes used, and total bytes free on the
specified (or default) drive(s).
Usage:  FREE [d:] ...
HExecute a command in the current directory and its subdirectories.
Usage:  GLOBAL [/H /I /P /Q] command
    /H  Process hidden subdirectories
    /I  Ignore exit codes
    /P  Prompt whether to execute the command in each directory
    /Q  Quiet (don't display directory names)
HCall a subroutine in a batch file.
Usage:  GOSUB label
The label must begin with a colon (:), and appear by itself on the line.
GOSUB ignores case differences when matching labels.
HContinue batch file processing at the line following the label.
Usage:  GOTO [/I] label
    /I  Continue current IFF and DO processing after the GOTO
The label must begin with a colon (:), and appear by itself on the line.
GOTO ignores case differences when matching labels.
HDisplay the 4OS2 help file.
Usage:  HELP [command]
HELP uses the PM VIEW.EXE program to display help for 4OS2 (4OS2.INF)
and OS/2 in general (CMDREF.INF).
HDisplay, read, or clear the history list.
Usage:  HISTORY [/A command] [/F /P] [/R [d:][path]filename]
    /A  Add command to history list
    /F  Clear history list
    /P  Pause after displaying each page
    /R  Read history list from specified file
If no parameters are entered, HISTORY displays the current history list.
HAllow conditional execution of commands.
Usage:  IF [NOT] condition [.AND. | .OR. | .XOR. [NOT] ...] command
The condition can be a string comparison (==, EQ, !=, NE, LT, LE, GE, or GT),
or one of the following:
    ERRORLEVEL [condition] number
    EXIST filename
    ISALIAS aliasname
    ISDIR [d:]path
    ISINTERNAL command
    ISLABEL labelname
HAllow IF/THEN/ELSE conditional execution of commands.
Usage:  IFF [NOT] condition [.AND. | .OR. | .XOR. [NOT] ...]
            THEN ^ ... ^ ELSE[[IFF] ... THEN] ^ ... ^ ENDIFF
The condition can be a string comparison (==, EQ, !=, NE, LT, LE, GE, or GT),
or one of the following:
    ERRORLEVEL [condition] number
    EXIST filename
    ISALIAS aliasname
    ISDIR [d:]path
    ISINTERNAL command
    ISLABEL labelname
HGet a single keystroke environment variable from standard input.
Usage:  INKEY [/C /D /K"..." /P /Wn /X] [text] %%varname
    /C  Clear keyboard buffer
    /D  Digits only
    /K  Allowable keystrokes, enclosed in double quotes
    /P  Don't display keystroke
    /W  Wait "n" seconds for a response
    /X  Do not add carriage return / line feed after user's entry
You can optionally display prompt text before the variable name.
HEnter an environment variable from the standard input.
Usage:  INPUT [/C /D /E /Ln /N /P /Wn /X] [text] %%varname
    /C  Clear keyboard buffer
    /D  Digits only
    /E  Edit existing value
    /L  Maximum of "n" characters
    /N  Disable input colors
    /P  Display * instead of characters
    /W  Wait "n" seconds for a response
    /X  Do not add carriage return / line feed after user's entry
You can optionally display prompt text before the variable name.
HSet the keyboard toggles (Caps Lock, Num Lock, and Scroll Lock).
Usage:  KEYBD [/Cn /Nn /Sn]
    /C  Caps lock
    /N  Num lock
    /S  Scroll lock
A 0 turns the toggle off, a 1 turns it on.
HDisplay the history list, or enable/disable the command line editing keys.
Usage:  KEYS [ON | OFF | LIST]
4OS2 includes this command for compatibility with CMD.EXE; for 4OS2 you
should normally use the HISTORY command instead.
    ON    Enable command history; read input characters
    OFF   Disable command history; read input lines
    LIST  Display the command history
HDisplay a file with forward and backward paging and scrolling.
Usage:  LIST [/A:[-[rhsda]] /H /S /W /X] [d:][path]filename...
    /A: Select files by attribute
    /H  Strip high bit from each character
    /S  Read from standard input
    /W  Wrap text at right margin
    /X  Display in hex mode
HSwitch a batch file to or from .BTM mode.
Usage:  LOADBTM [on | off]
LOADBTM switches a batch file (.CMD or .BTM) to and from .BTM mode.
If no argument is given, it displays the current LOADBTM status.
HEnable or disable command logging, change the log file name, or
add a comment to the log file.
Usage:  LOG [/H /W [d:]pathname] [ON | OFF | "text"]
    /H  Toggle history log
    /W  Specify new log filename and turn command logging on
Entering LOG with no parameters displays the log status and file name.
Entering LOG with text writes the text to the log file, even if LOG is
set OFF.
HCreate subdirectories.
Usage:  MD [/S] [d:]pathname...
    /S  Create intermediate subdirectories
HDisplay the system RAM status.
Usage:  MEMORY
MEMORY displays the free RAM, the size of the OS/2 swap file, the total and
free environment space, the total and free alias list space, and the total
command history space.
In 4OS2/32 only, MEMORY also displays the size of physical and resident RAM.
HCreate subdirectories.
Usage:  MKDIR [/S] [d:]pathname...
    /S  Create intermediate subdirectories
HMove files to other directories and drives.
Usage:  MOVE [d:][path]filename... [d:][path][filename]
             [/A:[-[rhsda]] /C /D /F /H /N /P /Q /R /S /T /U /V]
    /A: Select files by attribute
    /C  Move only files where the source file is newer than the target
    /D  Target is a directory
    /F  (4OS2/32 only) Don't copy the file(s) to the DELDIR directory
    /H  Move all files, including hidden & system
    /N  Don't actually move the file(s)
    /P  Prompt to confirm each move
    /Q  Don't display filenames or totals
    /R  Prompt before overwriting an existing file(s)
    /S  Move entire subdirectory tree
    /T  Display totals only
    /U  Move only those files that either don't exist in the target
          directory, or where the source file is newer than the target
    /V  Verify disk writes
HExecute a command when a specific condition occurs.
Usage:  ON BREAK command
        ON ERROR command
        ON ERRORMSG command
ON BREAK and ON ERROR only affect the current batch file.
HTells 4OS2 where to search for executable and batch files not in the
current directory.
Usage:  PATH [[d:]path][[;[d:]path]...]]
        PATH ;
If you enter PATH with no parameters, PATH displays the current search
path.  If you enter PATH and a semicolon, PATH clears the search path and
will search only the current directory (this is the default at system
startup).
Suspend alias or batch file execution while waiting for a keystroke.
Usage:  PAUSE [message]
If you don't specify a message, PAUSE displays a default message .
HChange to the disk drive and directory at the top of the directory stack
(saved by PUSHD).
Usage:  POPD [*]
The * option clears the directory stack, without changing the current drive
and directory.
HChange the command line prompt.
Usage:  PROMPT [text]
If you enter PROMPT with no parameters, PROMPT sets the prompt on drives A
and B to $n$g, and on all other drives to $p$g. The prompt characters are:
    $  The $ character                 n  Current drive
    _  CR/LF                           P  Current directory (upper case)
    b  The | character                 p  Current directory (lower case)
    c  The open parenthesis (          q  The = character
    D  Date (Fri  Dec 25, 1992)        r  The current errorlevel
    d  Date (Fri  12-25-92)            s  The space character
    e  The ASCII ESC character         T  Current time (12-hour)
    f  The close parenthesis )         t  Current time (24-hour)
    g  The > character                 v  OS/2 version number
    h  Destructive backspace         Xd:  Current directory (upper case) for
    i  OS/2 line 0 HELP prompt             drive d:, incl. drive letter
    l  The < character               xd:  Current directory (lower case) for
    M  12-hour time as hh:mm               drive d:, incl. drive letter
    m  12-hour time as hh:mm           z  Shell level
HSave the current disk and directory.
Usage:  PUSHD [[d:]pathname]
PUSHD saves the current directory on the directory stack, and if a pathname
is specified on the command line, changes the disk drive and directory.
HTerminate the current batch file.
Usage:  QUIT [value]
If you specify a value, QUIT will set ERRORLEVEL to that value.
HRemove one or more directories.
Usage:  RD [d:]path...
HReboot the system.
Usage:  REBOOT [/S /V]
    /S  Shutdown the file system, but don't reboot
    /V  Prompt for verification before rebooting
HPut a comment in a batch file.
Usage:  REM [comment]
Everything following a REM will be ignored, including quote characters,
the redirection symbols (|><) and the command separator character.
HRename files or subdirectories.
Usage:  REN [/A:[[-]rhsda] /N /P /Q /S /T] [d:][path]filename... [d:][path]filename
    /A: Select files by attribute
    /N  Don't actually rename the file(s)
    /P  Prompt for confirmation
    /Q  Don't display filenames
    /S  Rename subdirectory
    /T  Display totals only
HRename files or subdirectories.
Usage:  RENAME [/A:[[-]rhsda] /N /P /Q /S /T] [d:][path]filename... [d:][path]filename
    /A: Select files by attribute
    /N  Don't actually rename the file(s)
    /P  Prompt for confirmation
    /Q  Quiet (don't display filenames)
    /S  Rename subdirectory
    /T  Display totals only
HReturn from a GOSUB (subroutine) call in a batch file.
Usage:  RETURN
The RETURN command returns from a GOSUB call to the command following the
original GOSUB.
HRemove one or more directories.
Usage:  RMDIR [d:]path...
HPosition the cursor on the screen, and optionally display a message.
Usage:  SCREEN row column [message]
HDisplay text in color.
Usage:  SCRPUT row column [BRIght] [BLInk] fg ON [BRIght] bg text
    row     Start row
    column  Start column
    fg      Foreground character color
    bg      Background character color
    text    The text to display
Valid colors are Black, Blue, Green, Red, Magenta, Cyan, Yellow, and White.
HExecute a command on the specified files.
Usage:  SELECT [/A[:-rhsda] /D /E /H /I"text" /O:-deginrsu /Z]
          command ([path]filename)
    /A  Select files by attributes
    /D  Disable directory colorization
    /E  Display filenames in upper case
    /H  Hide "." and ".."
    /I  Match file descriptions
    /O  Sort sequence
    /Z  Display HPFS volumes in FAT format
HDisplay, create, modify, or delete environment variables.
Usage:  SET [/P] [/R [d:][path]filename...] [variable=[value]]
    /P  Pause after displaying each page
    /R  Read environment variables from a file
Entering SET with no variable or value displays the entire environment.  If
you don't enter a value, SET displays the value of that variable.
Otherwise, the variable and value are placed in the environment.  If the
variable already exists, its old contents are replaced by the new value.
HDisplay or set 4OS2 configuration variables.
Usage:  SETDOS [/B? /C? /D? /E? /Fx.y /I+|-command /L? /M? /N? /P? /R?
          /S?:? /U? /V? /X? /Y?]
    /B  Disable/enable bright backgrounds
    /C  Command separator character
    /D  Disable/enable descriptions
    /E  Escape character
    /F  Format for @EVAL
    /I  Disable/enable internal commands
    /L  Line or character input
    /M  Line editing mode
    /N  NoClobber setting for redirection
    /P  Variable parameter character
    /R  Number of screen rows
    /S  Cursor shape
    /U  Filename case
    /V  Batch echo
    /X  Alias/variable/redirection expansion
    /Y  Disable/Enable batch file single-step
HSave the current disk drive, directory, and environment.
Usage:  SETLOCAL
HAllow the use of more than 10 variables in a batch file.
Usage:  SHIFT [n]
SHIFT moves each batch file parameter "n" positions.  The default value for
"n" is 1.  You can reverse a SHIFT by giving a negative value for "n".
H Preserve the alias, history, and directory history lists.
Usage:  SHRALIAS [/U]
    /U  Unload SHRALIAS.EXE
SHRALIAS loads and unloads the SHRALIAS.EXE program, which retains any
global alias, command history, and directory history lists between Take
command sessions.  You must use this command rather than invoking
SHRALIAS.EXE directly.
HStart a program in a new OS/2 session.
Usage:  START [title] [/BG /C /DOS[=file] /FG /FS /I /ICON=name /INV /K /L
              /MAX /MIN /N /PGM /PM /POS=x,y,x1,y1 /WAIT /WIN /WIN3[=file]
              /WIN3S[=file]] [command ...]
    title  Title for title bar         /MAX  Start maximized
    /BG    Start in background         /MIN  Start minimized
    /C     Transient session           /N    Start without 4OS2
    /DOS   DOS session                 /PGM  Next argument is program name
    /FG    Start in foreground         /PM   PM application
    /FS    Full-screen session         /POS  Start position (x, y) and window
    /I     Inherit environment from            size (x1, y1) in pels
             CONFIG.SYS                /WAIT Wait for session to end
    /ICON  Specify icon file           /WIN  Windowed OS/2 session
    /INV   Invisible session           /WIN3 Windows 3 session (enhanced)
    /K     Keep session                /WIN  Windows 3 session (standard)
    /L     Local alias/history lists
HCopy standard input to standard output, and save a copy in the specified
file(s).
Usage:  TEE [/A] [d:][path]filename...
    /A    Append output to the file(s)
HDisplay a block of text in a batch file.
Usage:  TEXT
          .
          .
          .
        ENDTEXT
Both TEXT and ENDTEXT must be entered as the only command on that line.
HDisplay and (optionally) set the current system time.
Usage:  TIME [hh:mm:ss[am|pm]]
    hh  Hour (0 - 23)
    mm  Minute (0 - 59)
    ss  Second (0 - 59)
If you don't enter any parameters, TIME will display the current system
time and prompt for a new time.  TIME defaults to 24-hour format; you can
enter the time in 12-hour format by appending an "am" or "pm".
HTurn the system stopwatch on and off.
Usage:  TIMER [/1 /2 /3 /S] [ON]
    ON  Restart timer
    /1  Use timer #1
    /2  Use timer #2
    /3  Use timer #3
    /S  Display split time
HDisplay the contents of the specified file(s).
Usage:  TYPE [/A:[[-]rhsda] /L /P] [d:][pathname]filename...
    /A: Select files by attribute
    /L  Print line numbers preceding each line of text
    /P  Pause after each page
HRemove aliases from the alias list.
Usage:  UNALIAS [/Q] alias...
        UNALIAS *
    /Q  Don't display an error message if the alias doesn't exist
UNALIAS also accepts the wildcard character * to delete all aliases.
HRemove variables from the environment.
Usage:  UNSET [/Q] name...
        UNSET *
    /Q  Don't display an error message if the variable doesn't exist
UNSET also accepts the wildcard character * to delete all variables.
HDisplay the current 4OS2 and OS/2 versions.
Usage:  VER [/R]
    /R  Display OS/2 and 4OS2 revision levels
HDisplay, enable, or disable disk write verification.
Usage:  VERIFY [on | off]
Entering VERIFY with no parameters will display the current VERIFY state.
HDisplay the disk volume label(s).
Usage:  VOL [d:] ...
If you don't enter a drive name, VOL displays the disk label and the volume
serial number for the current drive.
HDisplay text in color in a vertical column.
Usage:  VSCRPUT row column [BRIght] [BLInk] fg ON [BRIght] bg text
    row     Start row
    column  Start column
    fg      Foreground character color
    bg      Background character color
    text    The text to display
Valid colors are Black, Blue, Green, Red, Magenta, Cyan, Yellow, and White.
HMinimize or maximize current 4OS2 window, restore default window
size, or change the window title.
Usage:  WINDOW [MIN | MAX | RESTORE] [/POS=row,col,width,height] ["title"]
    "title"   Change the window title.
    minimize  Minimize the 4OS2 window.
    maximize  Maximize the 4OS2 window.
    restore   Restore the 4OS2 window to its "normal" size.
HCopy standard input to standard output, and then copy the specified file(s)
to standard output.
Usage:  Y [d:][path]filename...