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“main” (Installation and Administration) — 2004/6/25 — 13:29 — page 343 — #369

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16.2.5 Switching Conﬁguration Proﬁles

The command scpm switch work switches to another proﬁle (the proﬁle

work, in this case). Switch to the active proﬁle to save modiﬁed settings of

the system conﬁguration. Alternatively, use scpm reload to do this.

When switching proﬁles, SCPM ﬁrst checks which resources of the active

proﬁle have been modiﬁed. It then queries whether the modiﬁcation of

each resource should be added to the active proﬁle or dropped. If you pre-

fer a separate listing of the resources (as in former versions of SCPM) use

the switch command with the -r parameter: scpm switch -r work.

SCPM then compares the current system conﬁguration with the proﬁle to

which to switch. In this phase, SCPM evaluates which system services need

to be stopped or restarted due to mutual dependencies or to reﬂect the

changes in conﬁguration. This is like a partial system reboot that concerns

only a small part of the system while the rest continues operating without

change.

It is only at this point that the system services are stopped, all modiﬁed re-

sources (e.g., conﬁguration ﬁles) are written, and the system services are

restarted.

16.2.6 Advanced Proﬁle Settings

You can enter a description for every proﬁle that is displayed with

scpm list. For the active proﬁle, set it with scpm set description

"text". Provide the name of the proﬁle for inactive proﬁles, for instance,

scpm set description "text" work. Sometimes it might be desir-

able to perform additional actions not provided by SCPM while switching

proﬁles. Attach up to four executables for each proﬁle. They are invoked at

different stages of the switching process. These stages are referred to as:

prestop prior to stopping services when leaving the proﬁle

poststop after stopping services when leaving the proﬁle

prestart prior to starting services when activating the proﬁle

poststart after starting services when activating the proﬁles

Switching from proﬁle work to proﬁle home thus proceeds as follows:

1. The prestop action of the proﬁle work is executed.

343SUSE LINUX Enterprise Server