1.CPU占用率高的进程

参数说明: topk 前 k 的进程、samplingTime 采样时间(秒)、采样间隔时间(秒)

  1. #!/bin/bash
  2. TOPK={{topk}}
  3. SECS={{samplingTime}}
  4. INTERVAL={{interval}}
  5. STEPS=$(( $SECS / $INTERVAL ))
  6. TEMP_FILE_PREFIX="/tmp/tat_public_cpu_usage"
  8. echo Watching CPU usage...
  9. for((i=0;i<$STEPS;i++))
  10. do
  11.   ps -eocomm,pcpu | tail -n +2 >> $TEMP_FILE_PREFIX.$$
  12.   sleep $INTERVAL
  13. done
  15. echo
  16. echo CPU eaters :
  17. cat $TEMP_FILE_PREFIX.$$ | \
  18. awk '
  19. { process[$1]+=$2;}
  21. END{
  22.   for(i in process) {
  23.     printf("%-20s %s\n",i, process[i]) ;
  24.   }
  25. }' | sort -nrk 2 | head -n $TOPK
  27. rm $TEMP_FILE_PREFIX.$$

2.查看目录占用磁盘空间大小

directory 需要查看的目录路径

  1. #!/bin/bash
  2. du -sh {{directory}}

3.显示 linux 内核版本信息

  1. #!/bin/bash
  2. uname -a

4.显示 linux 主机名

  1. #!/bin/bash
  2. hostname

5.显示僵尸进程

  1. #!/bin/bash
  2. processes=$(ps ax -o user,pid,ppid,pgid,args,stat,start,time)
  3. zombies=$(echo -e "${processes}" | grep -E "\s(Z|z|Z.*)\s")
  4. if [ $? == 1 ]; then
  5.   echo "no zombie processes exists on machine"
  6. else
  7.   echo -e "${processes}" | head -1
  8.   echo "$zombies"
  9. fi

6.清理数据

  1. #!/bin/bash
  3. function deletefiles() {
  4.   if [ ! -d $2 ]; then
  5.     echo "The specified directory("$2") is not exist."
  6.     return
  7.   fi
  9.   expiredTimeUnit=${1: -1}
  10.   expiredTimeValue=${1:0:-1}
  12.   if [ "$expiredTimeUnit" = "d" ]; then
  13.     expiredTime=$(($expiredTimeValue * 24 * 60 * 60))
  14.   elif [ "$expiredTimeUnit" = "h" ]; then
  15.     expiredTime=$(($expiredTimeValue * 60 * 60))
  16.   elif [ "$expiredTimeUnit" = "m" ]; then
  17.     expiredTime=$(($expiredTimeValue * 60))
  18.   else
  19.     echo "The unit("$expiredTimeUnit") of file age is not supported."
  20.     return
  21.   fi
  23.   for file in $(find $2 -type f -name "$3"); do
  24.     local currentDate=$(date +%s)
  25.     local modifyDate=$(stat -c %Y $file)
  26.     local existTime=$(($currentDate - $modifyDate))
  28.     if [ $existTime -gt $expiredTime ]; then
  29.       echo "File cleaning succeeded,path:"$file"."
  30.       rm -f $file
  31.     fi
  32.   done
  33. }
  35. deletefiles {{delayTime}} {{filePath}} "{{matchPattern}}"

参数说明：
delayTime 文件的有效时间。如 7d（代表7天），1h（代表1小时），5m（代表5分钟），默认是7d
filePath 清理文件路径。如：/root/log/
matchPattern 清理文件匹配格式，如 *.log。 支持正则匹配