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Shell Programming and Scripting
Understanding pattern matching used in a grep command
Post 302605177 by kristinu on Tuesday 6th of March 2012 08:53:02 PM
03-06-2012
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I originally had a shell script that did a grep 10 times to pull out the number of times a certain pattern occured in a file: ie...
aOccurances=`grep aPattern file|wc -l`
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...
...
...
fOccurances=`grep fPattern file|wc -l`
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Hi,
I wish to use a column, as inputted by a user from command line, for pattern matching.
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Hi all!
Thanks for taking the time to view this!
I want to grep out all lines of a file that starts with pattern 1 but also does not match with the second pattern.
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Hi,
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@unnumbered References
@sp 1
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This is the command output need to be matched:
Telnet console listening to port 42365.
(the port number changes every time)
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=======================================
#!/tools/AGRtools/bin/expect
exp_internal 1
set timeout 10
spawn bash
set bashId $spawn_id
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LEARN ABOUT REDHAT
split
SPLIT(1) FSF SPLIT(1) NAME
split - split a file into pieces SYNOPSIS
split [OPTION] [INPUT [PREFIX]] DESCRIPTION
Output fixed-size pieces of INPUT to PREFIXaa, PREFIXab, ...; default PREFIX is `x'. With no INPUT, or when INPUT is -, read standard input. Mandatory arguments to long options are mandatory for short options too. -a, --suffix-length=N use suffixes of length N (default 2) -b, --bytes=SIZE put SIZE bytes per output file -C, --line-bytes=SIZE put at most SIZE bytes of lines per output file -l, --lines=NUMBER put NUMBER lines per output file --verbose print a diagnostic to standard error just before each output file is opened --help display this help and exit --version output version information and exit SIZE may have a multiplier suffix: b for 512, k for 1K, m for 1 Meg. AUTHOR
Written by Torbjorn Granlund and Richard M. Stallman. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
The full documentation for split is maintained as a Texinfo manual. If the info and split programs are properly installed at your site, the command info split should give you access to the complete manual. split (coreutils) 4.5.3 February 2003 SPLIT(1)