Shell脚本

大于 -gt (greater than) 
小于 -lt (less than) 
大于或等于 -ge (greater than or equal) 
小于或等于 -le (less than or equal) 
不相等 -ne （not equal）

#!/bin/bash
#tigergao
pwd=/app/nginx/logs/access.log
 for num1 in `cat $pwd | awk ‘{print $9}‘ | grep -Ei "^4|^5" | wc -l`
  do
  echo 异常状态码总数:$num1
 for num2 in `cat $pwd | awk ‘{print $9}‘| wc -l`
  do
   echo 请求状态码总数:$num2
  k=$(echo "scale=2;$num1 * 100 / $num2"| bc)%
 echo 异常百分比:$k
  done
 done

#!/bin/bash
mysql -u root -p‘shsnc!@#‘ <<EOF
show databases;
use performance_schema;
show tables like ‘%global%status%‘;
select * from global_status where VARIABLE_NAME like ‘%slow%‘;
EOF

#!/bin/bash
i=`ps -ef | grep -i memcached | grep -v grep | wc -l`
  echo $i
 if [ $i -ne 0 ];then
  telnet 10.131.156.170 11111
   stats
 else
  echo "process is not running!"
 fi