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binshengliu/prepend_line_number.sh

Created June 16, 2020 00:53
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Prepend line number and a tab to each line
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prepend_line_number.sh
# Number each line
cat FILE | sed -r 's/^[[:space:]]*//' | awk '{print NR, "\t", $0}'
# Remove empty lines and number
cat FILE | sed -r 's/^[[:space:]]*//' | grep -v '^$' | awk '{print NR, "\t", $0}'
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