# !/usr/bin/bash log_dir="/usr/local/nginx/logs" back_log_dir="/disk110/nginx_log" time=`date +%Y%m%d-%H:%M:%S`   website="www.test1.com www.test2.com www.test3.com"; for i in $website do  if [ ! -d ${back_log_dir}/${i} ]  then   mkdir ${back_log_dir}/${i}  fi done  for i in $website do  if [ -s ${log_dir}/access_${i}.log ]  then   mv ${log_dir}/access_${i}.log ${back_log_dir}/${i}/access_${time}.log  fi  if [ -s ${log_dir}/error_${i}.log  ]  then   mv ${log_dir}/error_${i}.log ${back_log_dir}/${i}/error_${time}.log  fi done kill -USR1 `cat  /usr/local/nginx/logs/nginx.pid` for i in $website do  if [ -s ${back_log_dir}/${i}/access_${time}.log ]  then   xz  ${back_log_dir}/${i}/access_${time}.log  fi  if [ -s ${back_log_dir}/${i}/error_${time}.log ]  then   xz  ${back_log_dir}/${i}/error_${time}.log  fi done