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30 lines
580 B
30 lines
580 B
#!/usr/bin/env bash
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# Optionally specify number of lines to show, defaulting to 10:
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TOSHOW=10
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CASEOPT=""
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while getopts ":in:" opt; do
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case $opt in
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i)
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CASEOPT="-i"
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;;
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n)
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TOSHOW=$OPTARG
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;;
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\?)
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echo "Invalid option: -$OPTARG" >&2
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exit 1
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;;
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:)
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echo "Option -$OPTARG requires an argument." >&2
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exit 1
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;;
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esac
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done
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# sort and then uniqify STDIN,
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# sort numerically on the first field,
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# chop off everything but $TOSHOW lines of input
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sort < /dev/stdin | uniq -c $CASEOPT | sort -k1 -nr | head -$TOSHOW
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