linux 基本脚本编写

#!/bin/bash
lucky_number(){
    beg=1
    end=100
    echo "The lucky number is $(( RANDOM % ($end-$beg) + $beg))"   
}
for (( a = 0; a < 10; a ++ ))
do   
    lucky_number
done           

#! /bin/bash
 
for (( i = 0; i < 1000; i++ )); do
    for (( j = 2; j <= i - 1 ; j++ )); do
         if [[ $(( i % j )) == 0 ]]; then
             break
         fi
    done
    [ $j == $i ] && echo "$j"
done