shell脚本

#!/bin/bash

#purpose:test for loop to calculate 

#date:2015-01-31

#author:lirongqiang

declare -i s #declare s as an integer number

for ((i=i; i<100; i=i+1 ))

do 

s=s+i

echo "current i=$i"

done

echo "The result is $s"

------------------------------------------------------------------------------

#!/bin/bash

#purpose:test the for loop as string

#date:2015-01-31

#author:lirongqiang

LIST="Tom cat java python linux ruby perl hadoop"

for i in $LIST

do

echo $i

done

------------------------------------------------------------------------------

#!/bin/bash

#todo: use shell script's parameter code

#date:2015-01-28

#edit: by lrq

echo "this script's name =>$0"

echo "parameters $1 $2 $3 $4 $5 "

------------------------------------------------------------------------------

#!/bin/bash

#TODO:check user is root or not

#DATE:2015-01-30

#AUTHOR:LRQ

if [ $UID -ne 0 ]; then

echo "Non root user. Please run as root."

else 

echo "Root uesr"

fi

------------------------------------------------------------------------------

#!/bin/bash

#todo use to calculate some number

#date 2015-01-28

#edit by lrq

declare -i a=2

declare -i b=3

declare -i c=5

declare -i d=13

declare -i e=32

declare -i f=25

declare -i result=$a*$b+$c*$d-$e+$f

echo "expect result is 64"

echo "the final result is $result"

------------------------------------------------------------------------------

#!/bin/bash

#purpose:test file exists if else -f -d -e and so on

#date:2015-01-31

#author:lirongqiang

if [ ! -e logical ];then

touch logical

echo "just make a file logical"

exit 1

elif [ -e logical ] && [ -flogical ];then

rm logical

mkdir logical

echo "remove file ==>logical"

echo "and make directory logical"

exit 1

elif [ -e logical ] && [ -dlogical ];then

rm -rf logical

echo "remove directory recursive==>logical"

exit 1

else

echo "Does here have anything"

fi 

------------------------------------------------------------------------------

#!/bin/bash

#purpose:check the port is usable

#date:2015-01-31

#author:lirongqiang

#1.print the program's work in your screen

echo "now,the service of your linux system will bedetect!"

echo "then www,tft,ssh and sendmail+pop3 will be detect"

echo " "

#2. www

 www='netstat -an|grep LISTEN|grep :80'

 if [ "$www" != "" ];then

echo "www is running "

 else

echo "www is NOT running "

 fi

#3. ftp

 ftp='netstat -an|grep LISTEN|grep :21'

 if [ "$ftp" != "" ];then

  echo "FTP is running"

 else

echo "FTP is not running"

 fi

#4 ssh

 ssh='netstat -an|grep LISTEN|grep :22'

 if [ "$ssh" != "" ];then

  echo "ssh is running"

 else

echo "ssh is out of service"

 fi

#5. sendmail+pop3

 smtp='netstat -an|grep LISTEN|grep:25'

 pop3='netstat -an|grep LISTEN|grep:110'

 if [ "$smtp" != "" ]&& [ "$pop3" != "" ];then

  echo "smtp and pop3 is running,you canreceive and send mail "

 elif [ "$smtp" != "" ]&& [ "$pop3" = "" ];then

echo " receive mail has some problem "

 elif [ "$smtp" = ""  ]&& [ "$pop3" != "" ];then

echo " send mail has some problem "

 else

echo "total mail is out of service "

 fi

------------------------------------------------------------------------------

#!/bin/bash

#todo show what you have input in the console

#date 2015-01-28

#edit by lrq

echo "please input your name:"

read name

echo "THIS IS YOU INPUT DATA-->$name"

------------------------------------------------------------------------------

#!/bin/bash

#purpose:test case esac 

#date:2015-01-31

#author:lirongqiang

#1 print this program

 echo "This program will print yourselection."

 echo "please press your selectone,two,three"

 read number

 case $number in

  one)

echo "your choice is one"

;;

  two)

echo "your choice is two"

;;

  three)

echo "your choice is three"

;;

  *)

echo "Usag {one|two|three}"

exit 1

 esac

        

------------------------------------------------------------------------------

#!/bin/bash

#purpose:test find directory 

#date:2015-01-31

#author:lirongqiang

log_path=`find /root/* -name "*.log"`#to find all named aslog

for i in $log_path  #log_path is an stringarray 

do

`rm -rf $i`# remove the single log file

result=$?  # get the result lastexecution

if [ $result = 0 ];then

echo "$i has removed successful "#$?=0 means rmsuccessfully

else echo "error"

fi 

done

------------------------------------------------------------------------------

#!/bin/bash

#purpose:test the for loop as string

#date:2015-01-31

#author:lirongqiang

LIST="Tom cat java python linux ruby perl hadoop"

for i in $LIST

do

echo $i

done

------------------------------------------------------------------------------

------------------------------------------------------------------------------

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#!/bin/bash

#purpose:test for loop to calculate 

#date:2015-01-31

#author:lirongqiang

declare -i s #declare s as an integer number

for ((i=i; i<100; i=i+1 ))

do 

\ts=s+i

\techo"current i=$i"

done

echo "The result is $s"

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