Version Change on Unix

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This public service announcement was brought to you by Nancy Palmquist:
> Does anyone know the right LINK command to use to change the link between
> 
> /appl/fp  and another version folder in the /appl folder.
> 
> For example,
> 
> I need to link to /appl/fp_v5.0.15D4
> 
> I can not figure out the right command.

ln -sf /appl/fp_v5.0.15D4 /appl/fp

NOTE:  Some variants (notably Solaris 7 and 8) tend to ignore the force
flag and require prior manual removal of the link prior to using 'ln', or
they'll kick back "file exists" and do nothing--despite the -f argument.

mark->
-- 
"I'm not subtle. I'm not pretty, and I'll piss off a lot of people along
the way. But I'll get the job done" --Captain Matthew Gideon, "Crusade"