运维常用shell脚本二（压缩文件、过滤不需要的文件、检测进程）

一、压缩指定目录下的文件并删除原文件

#!/bin/bash
ZIP_DAY=7
function zip {
    local dir=$1
    if [ -d $dir ];then
           local file_num=`ls -l $dir |grep "^d"|wc -l`
           if [ $file_num -ge $ZIP_DAY ];then
                local tar_name=`ls -lt $dir | grep -v *.tar.gz | grep -v total | head -n 1 |awk '{print $9}'`
                cd $dir
                tar -czvPf $tar_name.tar.gz * --exclude=*.tar.gz >/dev/null 2>&1
                if [[ $? -eq 0 ]];then
                     find $backup_dir/* -type d -exec rm -rf {} ; >/dev/null 2>&1
                else
                     echo "失败"
                fi
           fi
     fi
}

二、过滤文件夹下不需要的文件

#!/bin/bash
filter_array=()
all=`ls $dir | grep .log`  //目录下所有的文件
gv=`ls -lt $dir | grep .log | awk '{print $9}' | head -5` //留前五条记录
function filter_array {
     declare -a result_list
     t=0
     flag=0
     all_array=(${all// / })
     gv_array=(${gv// / })
     for a in ${all_array[@]}
     do 
          for g in ${gv_array[@]}
          do
               if [ "$a" == "$g" ]; then
                   flag=1
               fi
          done 
          if [ $flag -eq 0 ]; then
               result_list[t]=$a
               t=$((t+1))
          else
               flag=0
          fi
   done 
   filter_array=${result_list[*]}
}

三、远程服务器执行命令

#!/bin/bash
read -p "输入要连接的远程服务器IP：" IP
ssh root@$IP > /dev/null 2>&1 <<EOF
        cd /usr/local
        ls
exit
EOF

四、centos 7 流量转发

#!/bin/bash
function add {
   firewall-cmd --zone=trusted --add-forward-port=port="本地端口":proto=tcp:toaddr= "目标主机ip":toport="目标主机端口" --permanent
   firewall-cmd --reload
   firewall-cmd --zone=trusted --list-all
}

function remove {
   firewall-cmd --zone=trusted --remove-forward-port=port="本地端口":proto=tcp:toaddr="目标ip":toport="目标主机端口" --permanent
   firewall-cmd --reload
   firewall-cmd --zone=trusted --list-all
}

五、循环检测进程是否被杀

#!/bin/bash
times=10
while(( "$times > 0" ))
do
    pid=`ps aux | grep "nginx" | awk '{print $2}'`
    if [[ -z $pid ]] ; then
       return 0
    fi
    sleep 1
    let "times--"
done