cut -f1 -d ' ' examples/apache_access.log | sort | uniq -c | sort -k1 -n | tail -1
- Take the Apache access log.
- Get the first field of every line where the fields are separated by spaces. (These are the IP addresses of the visitors.)
- Sort them.
- Drop duplicates prefixing each value by the number of occurances.
- Sort the new double column by the numeric value of the first field.