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Top Forums UNIX for Dummies Questions & Answers Extracting Parts of String "#" vs "%" Post 302954233 by Aia on Saturday 5th of September 2015 06:30:45 PM
Old 09-05-2015
# means to mask the least possible from the beginning.
## means to mask as much as possible from the beginning.
*/ means any amount of chars or none, followed by a /
Thus, the result:
Code:
$ echo "${filename#*/}"
first/second/third/fourth

% means to mask the least possible from the end.
%% means to mask as much as possible from the end.
 

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flow-mask(1)						      General Commands Manual						      flow-mask(1)

NAME
flow-mask -- Apply tags to flow files. SYNOPSIS
flow-mask [-hk] [-b big|little] [-C comment] [-d debug_level] [-m mask_fname] [-M active_def ...] DESCRIPTION
The flow-mask utility is used to modify the source and destination mask length's in flow records. OPTIONS
-b big|little Byte order of output. -C Comment Add a comment. -d debug_level Enable debugging. -h Display help. -k Keep time from input. -m mask_fname Load masks from mask_name. Defaults to /etc/flow-tools/cfg/mask -M mask_def Use active_def as the active tag definition(s). The configuration file is a collection of definitions. A definition lists a sequence of prefixes and the mask length to replace the match- ing prefix with. Lines begining with # are treated as comments and ignored. mask-definition command Description ---------------------------------------------------------------------- mask-definition Begin mask-definition section mask-definition foo prefix List the prefix to match on and the replacement mask. prefix 128.146/16 24 EXAMPLES
# #file: masks # mask-definition foo # All networks in 128.146/16 are /24's. prefix 128.146/16 24 # except for 128.146.214/24, which are /32's. prefix 128.146.214/24 32 flow-cat flows | flow-mask -mfoo -Fmasks | flow-print -f4 FILES
Configuration files: Mask - /etc/flow-tools/cfg/mask.cfg. BUGS
None known. AUTHOR
Mark Fullmer maf@splintered.net SEE ALSO
flow-tools(1) flow-mask(1)
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