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Searching a particular character in a file

 
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# 1  
Old 09-23-2010
Searching a particular character in a file
Hi, I want to search how many times is "a" present in a file named "data". How to do this? Please help
# 2  
Old 09-23-2010
Code:
ruby -00 -ne 'p $_.count("a")' data

# 3  
Old 09-23-2010
Code:
times=$(awk -Fa '{print NF-1})'

or:
Code:
times=$(awk '{print gsub("a","x")})'

# 4  
Old 09-24-2010
Code:
grep -o "a" data.txt |wc -l

# 5  
Old 09-24-2010
Can convert every character in every record to a single-character record with "fold -1".
Code:
cat data | fold -1 | grep -c "a"

 
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