简单的几个shell脚本四



1、测试用户uid和gid是否一样

#/bin/bash
#
if [ $# -lt 1 ];then
    echo "Usage:./1.sh ARG1 [ARG2...]"
    exit 7
fi
if ! id $1 &>/dev/null;then
   echo "No such user."
   exit 10
fi
if [ `id -n -u $1` == `id -n -g $1` ];then
  echo "yiyang"
else
  echo "buyiyang"
fi

2、传递一个参数给脚本，执行判断

#/bin/bash
#
if [ $# -lt 1 ];then
    echo "Usage:./1.sh ARG1 [ARG2...]"
    exit 7
fi
if [ $1 = 'q' ];then
   echo "Quiting..."
   exit 1
elif [ $1 = 'Q' ];then
   echo "Quiting..."
   exit 2
elif [ $1 = 'q' ];then
   echo "Quiting..."
   exit 3
elif [ $1 = 'quit' ];then
   echo "Quiting..."
   exit 4
elif [ $1 = 'Quit' ];then
   echo "Quiting..."
   exit 5
else
  echo $1
fi

3、计算1到100的和

#/bin/bash

#

SUM=0
declare -i SUM=0
for I in {1..100};do
   let  SUM=$[SUM+$I]
done
echo "The sum is :$SUM"

4、利用for循环添加user1到user10

#/bin/bash
#
I=0
declare -i I=0
for I in {1..10};do
 if id user$I &> /dev/null;then
    echo "user$I exists."
 else
    useradd user$I
    echo "user$I" |passwd --stdin &> /dev/null
    echo "Add user$I finished."
 fi
done

5、利用for循环语句实现添加和删除10个用户

#/bin/bash

#

I=0
declare -i I=0
for I in {1..10};do
if [ $# -lt 1 ];then
    echo "Usage:./7.sh 'add' 'del'"
    exit 7
elif [ "$1" == "add" ];then
 if id user$I &> /dev/null;then
     echo "user$I exists."
 else
    useradd user$I
    echo "user$I" |passwd --stdin &> /dev/null
    echo "Add user$I finished."
 fi
elif [ "$1" == "del" ];then
   if ! id user$I &> /dev/null;then
     echo "No user$I"
   else
    userdel  -r user$I
    echo "user$I deleted."
   fi
fi
done