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Top Forums Shell Programming and Scripting Need help to find total counts in a string Post 302911525 by balajesuri on Friday 1st of August 2014 07:46:10 AM
Old 08-01-2014
Code:
echo "1 A B C D F 3 F G 3 1 D L D" | grep -o "D" | wc -l

Code:
echo "1 A B C D F 3 F G 3 1 D L D" | tr ' ' '\n' | grep -c "D"

Code:
x="1 A B C D F 3 F G 3 1 D L D"
y=${x//[^D]}
echo ${#y}

 

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ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)
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