定时修改用户密码

Auth: Jin

Date: 20140403

Content: 

 1 #!/bin/bash -

 2 ### auth: Jin

 3 ### date: 20140311

 4 ### Desc: 创建没有写入权限的普通用户，创建修改随机密码脚本changepassword.sh并将脚本加入crontab 

 5 ### Usage: ./tmp.sh 

 6 

 7 #user and permit

 8 groupadd viewer && useradd viewer -g viewer && cat /proc/sys/kernel/random/uuid|passwd --stdin viewer && printf "umask 222\n" >> ~viewer/.bashrc && chmod 500 /home/viewer

 9 #ssh key

10 mkdir ~viewer/.ssh/ && cp ~root/.ssh/authorized_keys ~viewer/.ssh/

11 

12 

13 #change password shell

14 mkdir -p  /home/gbin && touch /home/gbin/changepassword.sh && chmod 750 /home/gbin/changepassword.sh

15 #content

16 shellcontent="#/bin/bash

17 ### auth: Jin

18 ### date: 20140311

19 

20 secret=\`cat /proc/sys/kernel/random/uuid | cut -d'-' -f1,3,5\`

21 

22 passwd <<EOF

23 \$secret

24 \$secret

25 EOF

26 

27 if [ $? -eq 0 ];then

28         echo 'Change password OK'

29 else

30         echo 'Change password fail'

31 fi"

32 

33 cat > /home/gbin/changepassword.sh << EOF

34 $shellcontent

35 EOF

36 

37 #注意几个转意的地方

38 #add crontal

39 cat >> /var/spool/cron/root << EOF

40 0 2 * * * /home/gbin/changepassword.sh >> /home/gbin/changepassword.log 2>&1

41 EOF

42 

43 #test change password shell

44 /home/gbin/changepassword.sh >> /home/gbin/changepassword.log 2>&1 && cat /home/gbin/changepassword.log

45 

46 trap "rm -f ./tmp.sh;exit" 0