[LBo] howto generate file names with dates for TAR backups?

[Andrew Henry]

I don't know if this is covered in the course as I'm only on chapter 3
but I have a question about incremental backups with TAR.

I want to create a backup file using the current date and I know that I
can assign a variable to 'date' with the following in a script:

$timestamp=date  (I think)

but I only want a portion of the date without spaces so that I can later
concatenate it to the file name:

backup-level0-[date].tar.

1.  How to I truncate the date command?

2.  How do I concatenate it to the end of my file name?

--andrew

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