Shell之基本脚本

1 #!/bin/bash
2 
3 read -p "Please input your first name: " firstname
4 read -p "Please input your last name: " lastname
5 echo -e "Your full name is: $firstname $lastname"
6 
7 exit 0

 1 #!/bin/bash
 2 
 3 echo -e "I will use ‘touch‘ command to create 3 files."
 4 read -p "Please input your filename: " filename
 5 filename=${filename:-wo}
 6 date1=$(date -d "-2day" +%Y%m%d)
 7 date2=$(date -d "-1day" +%Y%m%d)
 8 date3=$(date +%Y%m%d)
 9 touch "${filename}_${date1}"
10 touch "${filename}_${date2}"
11 touch "${filename}_${date3}"
12 
13 exit 0

1 #!/bin/bash
2 
3 read -p "Please input first number: " firstNumber
4 read -p "Please input second number: " secondNumber
5 total=$(($firstNumber * $secondNumber))
6 #declare -i total=$firstNumber*$secondNumber
7 echo "The result of $firstNumber x $secondNumber is: $total"
8 
9 exit 0

 1 #!/bin/bash
 2 
 3 read -p "Please input a filename: " filename
 4 test -z $filename && echo "You must input a filename." && exit 0
 5 test ! -e $filename && echo "Filename does not exist" && exit 0
 6 test -f $filename && filetype="regular file"
 7 test -d $filename && filetype=directory
 8 
 9 test -r $filename && perm="readable"
10 test -w $filename && perm="$perm:writeable"
11 test -x $filename && perm="$perm:executable"
12 
13 echo "The filename: $filename is a $filetype"
14 echo "And the permissions are: $perm"
15 
16 exit 0

1 #!/bin/bash
2 
3 read -p "Please input y/n: " yn
4 [ "$yn" == "Y" -o "$yn" == "y" ] && echo "OK,continue" && exit 0
5 [ "$yn" == "N" -o "$yn" == "n" ] && echo "oh,interrupt!" && exit 0
6 
7 echo "I don‘t know what your choice is" && exit 0

 1 #!/bin/bash
 2 
 3 echo "The script is $0"
 4 echo "Total parameter number is $#"
 5 [ "$#" -lt 2 ] && echo "The number of parameter is less than 2. Stop here" && exit 0
 6 echo "Your whole parameter is $@"
 7 echo "The first parameter is $1"
 8 echo "The second parameter is $2"
 9 
10 exit 0

 1 #!/bin/bash
 2 
 3 echo "The script is $0"
 4 echo "Total parameter number is $#"
 5 echo "Your whole parameter is $@"
 6 shift 1
 7 echo "Total parameter number is $#"
 8 echo "Your whole parameter is $@"
 9 shift 2
10 echo "Total parameter number is $#"
11 echo "Your whole parameter is $@"
12 shift 3
13 exit 0

 1 #!/bin/bash
 2 
 3 if [ "$1" == "hello" ]; then
 4     echo "Hello, how are you ?"
 5 elif [ "$1" == "" ]; then
 6     echo "You must input a parameter, ex: $0 someword"
 7 else
 8     echo "The only parameter is hello, ex: $0 hello"
 9 fi
10 
11 exit 0

 1 #!/bin/bash
 2 
 3 case $1 in
 4 "hello")
 5     echo "Hello, how are you ?"
 6     ;;
 7 "")
 8     echo "You must input a parameter, ex: $0 someword"
 9     ;;
10 *)
11     echo "The only parameter is hello, ex: $0 hello"
12     ;;
13 esac
14 
15 exit 0

 1 #!/bin/bash
 2 
 3 while [ "$yn" != "yes" -a "$yn" != "YES" ]
 4 do 
 5     read -p "Please input yes/YES to stop this program: " yn
 6 done
 7 
 8 echo "OK, you input the correct answer."
 9 
10 exit 0

 1 #!/bin/bash
 2 
 3 until [ "$yn" == "yes" -o "$yn" == "YES" ]
 4 do 
 5     read -p "Please input yes/YES to stop this program: " yn
 6 done
 7 
 8 echo "OK, you input the correct answer."
 9 
10 exit 0

1 #!/bin/bash
2 
3 for animal in dog cat elephant
4 do
5     echo "There are ${animal}s"
6 done
7 
8 exit 0

 1 #!/bin/bash 
 2 
 3 network="192.168.1"
 4 for num in $(seq 1 5)
 5 do
 6     ping -c 1 -w 10000 ${network}.${num} && result=0 || result=1
 7     if [ "$result" == "0" ]; then
 8         echo "Server ${network}.${num} is UP"
 9     else
10         echo "Server ${network}.${num} is DOWN"
11     fi
12 done

 1 #!/bin/bash
 2 
 3 read -p "Please input a number: " num
 4 
 5 s=0
 6 for((i=1; i<=$num; i++))
 7 do
 8     s=$(($s+$i))
 9 done
10 
11 echo "The result of 1+2+3+...+$num is: $s"