wget https://raw.github.com/pypa/pip/master/contrib/get-pip.py
python get-pip.py #安装pip python包管理工具
pip install ngxtop #下载安装ngxtop

ngxtop -l /usr/local/nginx/logs/access.log

ngxtop -t 1 -l /var/log/nginx/access.log top remote_addr request

Usage:
  ngxtop [options]
  ngxtop [options] (print|top|avg|sum) <var>
  ngxtop info

Options:
  -l <file>, --access-log <file> access log file to parse.
  -f <format>, --log-format <format> log format as specify in log_format directive.
  --no-follow ngxtop default behavior is to ignore current lines in log
           and only watch for new lines as they are written to the access log.
           Use this flag to tell ngxtop to process the current content of the access log instead.
  -t <seconds>, --interval <seconds> report interval when running in follow mode [default: 2.0]
  -g <var>, --group-by <var> group by variable [default: request_path]
  -w <var>, --having <expr> having clause [default: 1]
  -o <var>, --order-by <var> order of output for default query [default: count]
  -n <number>, --limit <number> limit the number of records included in report for top command [default: 10]
  -a <exp> ..., --a <exp> ... add exp (must be aggregation exp: sum, avg, min, max, etc.) into output
  -v, --verbose more verbose output
  -d, --debug print every line and parsed record
  -h, --help print this help message.
  --version print version information.
  Advanced / experimental options:
  -c <file>, --config <file> allow ngxtop to parse nginx config file for log format and location.
  -i <filter-expression>, --filter <filter-expression> filter in, records satisfied given expression are processed.
  -p <filter-expression>, --pre-filter <filter-expression> in-filter expression to check in pre-parsing phase.