Expand Configuration and Management Manual (G06.24+)

Managing the Network
Expand Configuration and Management Manual—523347-008
19-3
Changing Your Default Values
Changing Your Default Values
Each user on the system has two sets of default values: current default values and
saved default values. Saved default values are in effect when you log on. Current
default values define your present location or frame of reference in the system and
network. You can move around on the system and network by changing the current
system, volume, and subvolume defaults.
The current defaults serve another important function—when you specify a partial file
name in a command, the operating system uses your current default values to supply
missing parts of a file name. This process of adding parts to file names is known as
file-name expansion.
VOLUME Command
You can use the VOLUME command to change your current default node, volume, or
subvolume. The following example changes the default subvolume from $GERT.STEIN
(on your home node) to the subvolume RHALL on \LONE.$WELL:
VOLUME \LONE.$WELL.RHALL
After you enter this command, your current defaults become node \LONE, volume
$WELL, and subvolume RHALL. For example, the TACL program will expand the
partial file name SECT12 to \LONE.$WELL.RHBALL.SECT12.
To change your current subvolume from \LONE.$SAG.RHALL to \LONE.$SAG.VITA,
enter the following:
VOLUME VITA
If you enter the VOLUME command with no options, all your current defaults (node,
volume, and subvolume) are reset to your saved defaults.
SYSTEM Command
Use the SYSTEM command to change your current default node name. After you use
the SYSTEM command, you can omit the node name from the name of a file on a
remote node.
The following example sets the current default node name to \LONE:
SYSTEM \LONE
After you enter the SYSTEM \LONE command, file names you specify are assumed to
reside on node \LONE. Entering SYSTEM without specifying a node name resets the
current default node to your saved default node.
Note. In some situations, the TACL program does not supply the subvolume name by default.
If a volume name is immediately followed by a file identifier, the TACL program does not recog-
nize it as a valid file name and does not supply the subvolume name. For example,
VOL1.MYFILE is not a valid name, but VOL1.SUBVOL.MYFILE and SUBVOL.MYFILE are
valid file names.