linux 常用shell

#!/bin/bash
#这个脚本用于判断服务是否正常启动
#作者：xuehen
port=$(nmap -sT 10.0.1.99|grep tcp|grep http |awk '{print $2}')
if [ "$port" == "open" ]
    then
      echo "$(date) apache is running" > /root/log_acc
     else
          service httpd restart
      echo "$(date) service httpd restart" > /root/log_err

fi

##########################################

#!/bin/bash
read -p "please choice yes/no :" -t 30 cho
   case $cho in 
           "yes")
         echo "your choose is yes"
             ;;
           "no")
            ;;
       *)
       echo "your choose is wrong"
            ;;

      esac

#####################################

#!/bin/bash
#该脚本为多分支if案例
#-p：提示用户输入信息
#-s:用于加密，输入的内容不显示
#-t:等待用户输入的时间
read -p "please input a file_name:" file
 if [ -z "$file" ]
   then 
     echo "your put is empty"
  elif [ -f "$file" ]
   then 
       echo "your put is regeular file"
  elif [ -d "$file" ]
     then
         echo "your put is document"
   elif [ ! -e "$file" ]
     then 
        echo "your put is not exist"

 fi

######################################

#!/bin/bash
date=$(date +%y%m%d)
size=$(du -sh /etc )
if  [ -e /tmp/dbbak ]
then
   echo "Date:$date" > /tmp/dbbak/db.txt
   echo "Size:$size" >> /tmp/dbbak/db.txt
 cd /tmp/dbbak
  tar -zcf etc_"$date"_tar.gz  /etc  /tmp/dbbak/db.txt &>/dev/null
  rm -rf /tmp/dbbak/db.txt 
else 
  mkdir /tmp/dbbak
  echo "Date:$date" > /tmp/dbbak/db.txt
   echo "Size:$size" >> /tmp/dbbak/db.txt
 tar -zcf etc_"$date"_tar.gz  /etc  /tmp/dbbak/db.txt &>/dev/null
 rm -rf /tmp/dbbak/db.txt

fi 

###############################################

#!/bin/bash
s=0
for ((i=1;i<=100;i++))
  do 
   s=$(($s+$i))
done

 echo  "the result is:" $s

###################################

#!/bin/bash
for time in moring  noon after evening
   do 
       echo "Now is $time"
 done
#!/bin/bash
for time in morning noo afternoon evening
      do 
         echo "Now is $time!"

      done

###############################################

#!/bin/bash
rate=$(df -h |grep /dev/sda5|awk '{print $5}'|cut -d"%" -f1)
  if [ $rate -ge 4 ]
    then 
   echo "warining !!! Date:$(date) is full" 
      mail -s " rate is used " xuehen < /etc/passwd
     exit 1

 fi 

#################################

#!/bin/bash
read -p "please input four parameters that is number:"
for x in "$*"
    do 
          echo "$*"    
    done

for y in "$@"
    do 
           echo $y

  done

####################################

#!/bin/bash
#字符串判断
#-z:为空返回真
read -p "please input your name:" $name
  if [ -z = $1 ] ;then
 
       echo -e "\e[1;34m the put is empty \e[0m"
      
 fi