[root@localhost wyb]# cat user10.sh #!/bin/bash#批量创建10个系统帐号wangyb01-wangyb10并设置密码（密码为随机8位字符串）。>user.listfor user in `seq -w 10`do     useradd wangyb$user   password=`echo $RANDOM|md5sum|cut -c 1-8`   echo $password|passwd wangyb$user --stdin   echo wangyb$user $password >> user.listdone[root@localhost wyb]# bash user10.sh Creating mailbox file: File existsuseradd: warning: the home directory already exists.Not copying any file from skel directory into it.Changing password for user wangyb01.passwd: all authentication tokens updated successfully.Creating mailbox file: File existsuseradd: warning: the home directory already exists.Not copying any file from skel directory into it.Changing password for user wangyb02.passwd: all authentication tokens updated successfully.Creating mailbox file: File existsuseradd: warning: the home directory already exists.Not copying any file from skel directory into it.Changing password for user wangyb03.passwd: all authentication tokens updated successfully.Creating mailbox file: File existsuseradd: warning: the home directory already exists.Not copying any file from skel directory into it.Changing password for user wangyb04.passwd: all authentication tokens updated successfully.Creating mailbox file: File existsuseradd: warning: the home directory already exists.Not copying any file from skel directory into it.Changing password for user wangyb05.passwd: all authentication tokens updated successfully.Creating mailbox file: File existsuseradd: warning: the home directory already exists.Not copying any file from skel directory into it.Changing password for user wangyb06.passwd: all authentication tokens updated successfully.Creating mailbox file: File existsuseradd: warning: the home directory already exists.Not copying any file from skel directory into it.Changing password for user wangyb07.passwd: all authentication tokens updated successfully.Creating mailbox file: File existsuseradd: warning: the home directory already exists.Not copying any file from skel directory into it.Changing password for user wangyb08.passwd: all authentication tokens updated successfully.Creating mailbox file: File existsuseradd: warning: the home directory already exists.Not copying any file from skel directory into it.Changing password for user wangyb09.passwd: all authentication tokens updated successfully.Creating mailbox file: File existsuseradd: warning: the home directory already exists.Not copying any file from skel directory into it.Changing password for user wangyb10.passwd: all authentication tokens updated successfully.[root@localhost wyb]# cat user.list wangyb01 77950e07wangyb02 ace3cfb1wangyb03 2cd63081wangyb04 0f891e3cwangyb05 600bedd4wangyb06 73d3dfdcwangyb07 30740006wangyb08 54cf685fwangyb09 ee3f88afwangyb10 b54d2555[root@localhost wyb]# su wang01su: user wang01 does not exist[root@localhost wyb]# su wangyb01[wangyb01@localhost wyb]$ su wangyb10Password: [wangyb10@localhost wyb]$ [root@localhost wyb]# cat deluser10.sh #!/bin/bash#批量删除10个系统帐号wangyb01-wangyb10并设置密码（密码为随机8位字符串）。> user.listfor user in `seq -w 10`do     userdel wangyb$userdone[root@localhost wyb]# bash deluser10.sh [root@localhost wyb]# su wangyb01su: user wangyb01 does not exist[root@localhost wyb]#