07-29-2011
Extraction of numbers from input
I have the following input:
xxxx-2.7.19_WR3
I have extract the following:
2.7.19
Can anyone suggest an awk or sed command to do the above...
another condition is
if the input is :
xxx-xxx_xxx-1.4-1_WR3.0bg.armv6jel_vfp
it shud still extract : 1.4-1
whenever "-" is followed by numbers, it should be extracted till "_WR3"
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LEARN ABOUT DEBIAN
bup-meta
bup-meta(1) General Commands Manual bup-meta(1)
NAME
bup-meta - create or extract a metadata archive
SYNOPSIS
bup meta --create
[-R] [-v] [-q] [--no-symlinks] [--no-paths] [-f file] <paths...>
bup meta --list
[-v] [-q] [-f file]
bup meta --extract
[-v] [-q] [--numeric-ids] [--no-symlinks] [-f file]
bup meta --start-extract
[-v] [-q] [--numeric-ids] [--no-symlinks] [-f file]
bup meta --finish-extract
[-v] [-q] [--numeric-ids] [-f file]
DESCRIPTION
bup meta either creates or extracts a metadata archive. A metadata archive contains the metadata information (timestamps, ownership,
access permissions, etc.)
for a set of filesystem paths.
OPTIONS
-c, --create
Create a metadata archive for the specified paths. Write the archive to standard output unless --file is specified.
-t, --list
Display information about the metadata in an archive. Read the archive from standard output unless --file is specified.
-x, --extract
Extract a metadata archive. Conceptually, perform --start-extract followed by --finish-extract. Read the archive from standard
input unless --file is specified.
--start-extract
Build a filesystem tree matching the paths stored in a metadata archive. By itself, this command does not produce a full restora-
tion of the metadata. For a full restoration, this command must be followed by a call to --finish-extract. Once this command has
finished, all of the normal files described by the metadata will exist and be empty. Restoring the data in those files, and then
calling --finish-extract should restore the original tree. The archive will be read from standard input unless --file is specified.
--finish-extract
Finish applying the metadata stored in an archive to the filesystem. Normally, this command should follow a call to --start-
extract. The archive will be read from standard input unless --file is specified.
-f, --file=filename
Read the metadata archive from filename or write it to filename as appropriate. If filename is "-", then read from standard input
or write to standard output.
-R, --recurse
Recursively descend into subdirectories during --create.
--numeric-ids
Apply numeric user and group IDs (rather than text IDs) during --extract or --finish-extract.
--symlinks
Record symbolic link targets when creating an archive, or restore symbolic links when extracting an archive (during --extract or
--start-extract). This option is enabled by default. Specify --no-symlinks to disable it.
--paths
Record pathnames when creating an archive. This option is enabled by default. Specify --no-paths to disable it.
-v, --verbose
Be more verbose (can be used more than once).
-q, --quiet
Be quiet.
EXAMPLES
# Create a metadata archive for /etc.
$ bup meta -cRf etc.meta /etc
bup: removing leading "/" from "/etc"
# Extract the etc.meta archive (files will be empty).
$ mkdir tmp && cd tmp
$ bup meta -xf ../etc.meta
$ ls
etc
# Restore /etc completely.
$ mkdir tmp && cd tmp
$ bup meta --start-extract -f ../etc.meta
...fill in all regular file contents using some other tool...
$ bup meta --finish-extract -f ../etc.meta
BUGS
Hard links are not handled yet.
BUP
Part of the bup(1) suite.
AUTHORS
Rob Browning <rlb@defaultvalue.org>.
Bup unknown- bup-meta(1)