[NTLUG:Discuss] Script question

[Steve Baker]

Bob Byron wrote:
> 
> You might give something like this a try:
> rm domains.*.3
> filename=`ls domains.*.2 | cut -d '.' -f 1-2`
> mv ${filename}.2 ${filename}.3

It would be simpler & safer (I think) to do this:

  rm domains.*.3
  mv domains.*.2 `basename domains.*.2 .2`.3
  mv domains.*.1 `basename domains.*.1 .1`.2

The basename command removes the extension specified in the second
argument from the filename mentioned in the first argument.

Personally, I'd have structured the problem a little differently
and placed the backup copies into subdirectories named '.1', '.2' and '.3'
so I could say:

  rm .3/*
  mv .2/* .3
  mv .1/* .2

...that's elegant because you can have as many files as you like backed
up in each directory and the 'aging' process happens in lockstep for all
of them.

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