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korovamilk/awk_pattern_count_print.sh

Created September 12, 2014 09:42
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Find Pattern in file and print matching strings when occurencies > 1 (per line)
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awk_pattern_count_print.sh
# example email - real name list "<filename>"
# (note that name4 entry is broken - email appears 2 times
name1@example.com;"Real Name"
name2@example.com;"Real Name"
name3@example.com;"Real Name"
name4@example.com;name4@example.com;"Real Name"
# following awk will find and print the lines with MORE than one matching pattern
# (here I grep for "@")
$ awk '{n=split($0,c,"@")-1;if (n>1) print $0 }' <filename>
name4@example.com;name4@example.com;"Real Name"
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