shell-script的簡單舉例，shell-script舉例

shell-script的簡單舉例，shell-script舉例

#!/bin/bash#defind the pathPATH=/usr/localexport PATHread -p "please input your first name:" firstnamereap -p "please input your last name:" lastnameecho -e "\nyour name is: $firstname $lastname"#use date create fileread -p "please input your filename:" fileuserfilename=${fileuser:-"filename"}#use date get the filenamedate1=$(date --date='2 days ago' +%Y%m%d)date2=$(date --date='1 days ago' +%Y%m%d)date3=$(date +%Y%m%d)file1=${filename}${date1}file2=${filename}${date2}file3=${filename}${date3}touch "$file1"touch "$file2"touch "$file3"#條件判斷式read -p "please input (Y/N): " ynif [ "$yn"=="Y" ] || [ "$yn"=="y" ] ; then    echo "OK continue"    exit 0fiif [ "$yn"=="N" ] || [ "$yn"=="n" ] ; then    echo "OK continue"    exit 0fi#第二種情況if [條件判斷式]; then    內容else    內容fi    #三if [條件判斷式]; then    內容elif [條件判斷式]; then    內容else    內容fi#利用case...esac判斷case $變數名稱 in   "第一個變數內容")   程式段   ;;   "第二個變數內容")   程式段   ;;   *)   程式段（不包含第一和第二個變數內容中的）   exit 1    ;;esac#舉例case $1 in   "one")   echo "This is one"   ;;   "two")   echo "this is two"   ;;   "three")   echo "This is three"   ;;   *)   echo "no number"   ;;esac#利用function功能（shell script執行方式是 由上而下，由左至右，所以function函數一定要寫在程式的最前邊）function printit(){   echo -n "Your choice is "}