Bash Command Line and Shell Scripts by Oswald Campesato

Author:Oswald Campesato [Campesato, Oswald]
Language: eng
Format: epub, mobi, pdf
ISBN: 9781683925040
Publisher: Mercury Learning and Information LLC.
Published: 2020-08-15T04:00:00+00:00

Listing 5.4: skuvalues.txt

4520 5530 6550 7200 8000

Listing 5.5: skusold.txt

4520 12 4520 15 5530 5 5530 12 6550 0 6550 8 7200 50 7200 10 7200 30 8000 25 8000 45 8000 90

THE BACKSLASH CHARACTER AND THE GREP COMMAND

The “\” character has a special interpretation when it’s followed by the following characters:

“\b” = Match the empty string at the edge of a word

“\B” = Match the empty string provided it’s not at the edge of a word, so:

“\brat\b” matches the separate word “rat” but not “crate”, and

“\Brat\B” matches “crate” but not “furry rat”

“\<” = Match the empty string at the beginning of the word.

“\>” = Match the empty string at the end of the word.

“\w” = Match word constituent, it is a synonym for “[_[:alnum:]]”.

“\W” = Match non-word constituent, it is a synonym for “[^_[:alnum:]]”.

“\s” = Match whitespace, it is a synonym for “[[:space:]]”.

“\S” = Match non-whitespace, it is a synonym for “[^[:space:]]”.

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