下载源码包,考虑到每天学习量比较大

**

为了让有计划考红帽认证和打算进行运维工作的人更系统的学习,我从网上挑选了101道RHCE真题和答案,考虑到每天学习量比较大,所以每天摘取10道题进行推送,直至推送完毕,希望对大家有用,谢谢。

61、1、建立一个分区,大小为300M,挂在到/common,并使之永久生效
#fdisk /dev/sda
p→n→+300M→w
#partprobe
#mkfs.ext3 /dev/sda5
#mkdir /common
#mount /dev/sda5 /common
#df -TH
#vim /etc/fstab
/dev/sda5 /common ext3 defaults 0 0

假设你的分区是/dev/sda5
方法2:

  1. e2label /dev/sda5 common
  2. echo -e "LABEL=common t /common t ext3 t defaults t 1 1" >>/etc/fstab
    方法3:
    echo "mount /dev/sda5 /common" >>/etc/rc.local

62、配置 NTP客户端使其能够与 server1.example.com服务器进行网络时间同步

开机自启动
                            RHCT
您需要在3.5时内完成所有试题,3.5小时后,系统将自动关机!
您会注意到有些条件指定某一个服务对my133t.org 域无效,这个域中的所有的系统在172.25.0.0/255.255.0.0网段中,同时这个网段中的所有主机也在my133t.org域内;example.com域中主机在172.24.0.0/255.255.0.0网段内!
如果需要安装软件,您可以通过YUM实现,YUM源路径为:
http://server1.example.com/pub/server
在您进行考试之前,您首先要取得权限,并设置您系统的密码为:rW9ySX
配置静态地址信息:
IP地址为:172.24.0.X(其中X为本机编号)
子网掩码:255.255.0.0
网关;172.24.254.254
DNS:172.24.254.254
加入
vim /etc/hosts
172.24.X.X  stationX.example.com  stationX

64、配置 apache虚拟主机,满足以下需求
a.DocumentRoot路径为/var/www/virt
b.从服务器
cd /var/www/virt/
wget
vim /etc/httpd/conf/httpd.conf
修改985行虚目录
ServerAdmin [email protected]
    DocumentRoot /var/www/virt
    ServerName www13.example.com
DirectoryIndex virt.html

/etc/init.d/httpd restart

c.网站域名为 station编号)
d.允许用户 usr-2能够在/var/www/virt文件夹中创建文件
cd /var/www/
setfacl -m u:usr-2:rwx virt/
检测su到usr-2 在virt下创建文件

65、配置 Squid代理服务器,满足以下需求
yum install squid -y
a.更改 Squid监听端口为 8080
vim /etc/squid/squid.conf
921行改为 8080
b.只允许本机以及 example.com域内的所有主机访问本机 Squid服务
在574行下加一行acl example src 172.24.0.0/255.255.255.0
在637行下加一行http_access allow example(注意不要加到DENY下边)
/etc/init.d/squid restart
chkconfig squid on
检测在浏览器里设置代理检测

66、配置 apache服务,满足以下需求
yum install httpd-* -y
a.通过 stationx.example.com可以访问本机 apache服务(x为当前 station编号)
cd /var/www/html/
wget
b.主页路径为
vim /etc/httpd/conf/httpd.conf
修改985行虚目录
ServerAdmin [email protected]
    DocumentRoot /var/www/html
    ServerName station13.example.com
DirectoryIndex test.html
/etc/init.d/httpd restart

67、拒绝 hack.org域内的所有主机访问本机的 ftp服务
vim /etc/hosts.deny
vsftpd:172.25.0.0/255.255.0.0

68、配置 ftp服务
yum install vsftpd –y
/etc/init.d/vsftpd restart
chkconfig vsftpd on

59、配置 IMAPS邮件加密服务,满足以下需求
vim /etc/dovecot.conf
91  92 行去掉注释
a.IMAPS只为 example.com域内的所有主机提供服务 ,IMAPS所使用的电子证书信息如下 :
cd /etc/pki/tls/certs
make dovecot.pem
按下面要求做dovecot.pem
b.使用默认的 country.state.locality.organization
c.Organizational unit设置为 rhce
c.Common Name为 stationx.example.com(x为当前 station编号)
才.邮件地址为 [email protected](x为当前 station编号)
最后复制dovecot.pem 到/etc/dovecot 91 92行的目录里面
cp dovecot.pem /etc/pki/dovecot/private/
cp dovecot.pem /etc/pki/dovecot/certs/
/etc/init.d/dovecot restart
检测mutt -f imaps://[email protected]

69、拒绝 hack.org域内的所有主机访问本机的 pop3服务
iptables -A INPUT -p tcp -s 172.25.0.0/16 --dport 110 -j REJECT
iptables -A INPUT -p udp-s 172.25.0.0/16 --dport 110 -j REJECT
iptables -A INPUT -p tcp -s 172.25.0.0/16 --dport 993 -j REJECT
/etc/init.d/iptables save

70、配置本机 SMTP服务,使其可以接受本机以及外部的邮件
yum install sendmail-* -y
yum install m4 –y(可能默认安装好的)
cd /etc/mail
vim sendmail.mc
116 行 127.0.0.1 改成0.0.0.0
m4 sendmail.mc>sendmail.cf
vim local-host-names
添加 stationX.example.com
/etc/init.d/sendmail restart
测试
mutt -f imap://[email protected] 收发邮件测试

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{SYS_CAPTCHA_LEN = 4}

通过/var/www/extsuite/extman/daemon下的cmdserver脚本,可是webman的首页获得系统信息
加入开机启动:
vim /etc/rc.local

 

101道RHCE考题和详细答案(七),101道rhce考题答案

修改权限:chmod 600/etc/vsftpd/vuser.db

{/var/www/extsuite/extman/daemon/cmdserver & }

给webman网页添加Graph Log
yum install rrdtool
下载rrdtool-perl-1.3.8-6.el6.x86_64.rpm
yum localinstall rrdtool-perl-1.3.8-6.el6.x86_64.rpm
cd /var/www/extsuite/extman/addon/
cp -r mailgraph_ext/ /usr/local/
cd /usr/local/mailgraph_ext/
less README
./mailgraph-init start
下载File-Tail-0.99.3.tar.gz
tar zxf File-Tail-0.99.3.tar.gz
cd File-Tail-0.99.3
perl Makefile.PL
yum list perl-Time-HiRes
yum install perl-Time-HiRes.x86_64 -y
perl Makefile.PL
make install
cd /usr/local/mailgraph_ext/
./mailgraph-init restart
加入开机启动
vim /etc/rc.local

vi /etc/mail/access ; 加入本机域名 的 RELAY

               /hoem/bbb   /web2

三. 安装webmail, 包含extmail,extman
下载源码包:
extman-1.1.tar.gz
extmail-1.2.tar.gz


权限:chmod 700 /pub

}

cd /var/www/extman/docs
cp mysql_virtual_alias_maps.cf /etc/postfix/mysql-alias.cf
cp mysql_virtual_domains_maps.cf /etc/postfix/mysql-domains.cf
cp mysql_virtual_mailbox_maps.cf /etc/postfix/mysql-mailboxs.cf

cd /var/www/extsuite/extmail/
http的虚拟主机

less INSTALL
vim /etc/httpd/conf/httpd.conf
{
NameVirtualHost *:80
<VirtualHost *:80>
DocumentRoot /var/www/html
ServerName server88.example.com
</VirtualHost>

<VirtualHost *:80>
ServerName mail.extmail.org
DocumentRoot /var/www/extsuite/extmail/html/
ScriptAlias /extmail/cgi /var/www/extsuite/extmail/cgi
Alias /extmail /var/www/extsuite/extmail/html
SuexecUserGroup email email
</VirtualHost>
}
chown -R email.email cgi/
/etc/init.d/httpd restart

在真机上:vim /etc/hosts
{
192.168.0.12 mail.extmail.org

#chroot_list_file=/etc/vsftpd/chroot_list
#ls_recurse_enable=YES
listen=YES
#listen_ipv6=YES
pam_service_name=vsftpd
userlist_enable=YES
tcp_wrappers=YES
# anon_root=/var/ftp
# local_root=/var/ftp_private
pasv_max_port=60000
pasv_min_port=50000
anon_umask=000
anon_world_readable_only=NO
anon_other_write_enable=YES

加 auth        required      pam_userdb.so db=/etc/vsftpd/vuser

一.升级postfix,包含mysql,sasl,tls
1,安装相应软件:
yum install -y db*devel make gcc mysql-devel mysql-sever cyrus*
下载源码包;
postfix-2.10.2.tar.gz
tar zxf postfix-2.10.2.tar.gz
cd postfix-2.10.2
2,查看相应软件路径:
rpm -ql mysql-devel
rpm -ql cyrus-sasl-devel-2.1.23-13.el6_3.1.x8_64
less MYSQL_README
less TLS_README
less SASL_README
3.编译makefile
make -f Makefile.init makefiles 'CCARGS=-DHAS_MYSQL -I/usr/include/mysql -DUSE_SASL_AUTH -DUSE_CYRUS_SASL -I/usr/include/sasl -DUSE_TLS' 'AUXLIBS=-L/usr/lib64/mysql -lmysqlclient -lz -lm -L/usr/lib64 -lsasl2 -lssl -lcrypto'
4.升级:
make update
5,检测:
postconf -m
postconf -a
postconf -A
6.查看版本:
postconf mail_version

chkconfig saslauthd on

 改:Lliten-on port { 192.168.0.100; }服务器ip

{usr/local/mailgraph_ext/mailgraph-init restart}

当然有兴趣的话你换可以加上mailscanner和spamassassin实现反垃圾和反病毒邮件

本文出自 “linux” 博客,请务必保留此出处

iptables and selinux disables 一.升级postfix,包含mysql,sasl,tls 1,安装相应软件: yum install -y db*devel make gcc mysql-devel mysql-sever cyrus* 下载...

TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl

Aaa(用户)      pptp     123(密码)      * (所有中任选一)/192.168.0.23(保留)

make install

extman
cd ../extman/
webman的主配文件
vim webman.cf
{
SYS_MAILDIR_BASE = /home/email
SYS_SESS_DIR = /tmp
SYS_CRYPT_TYPE = plain
}
http的虚拟主机
vim /etc/httpd/conf/httpd.conf
{
<VirtualHost *:80>
DocumentRoot /var/www/html
ServerName server88.example.com
</VirtualHost>

<VirtualHost *:80>
ServerName mail.extmail.org
DocumentRoot /var/www/extsuite/extmail/html/
ScriptAlias /extmail/cgi /var/www/extsuite/extmail/cgi
Alias /extmail /var/www/extsuite/extmail/html
*******************
ScriptAlias /extman/cgi /var/www/extsuite/extman/cgi
Alias /extman /var/www/extsuite/extman/html
*******************
SuexecUserGroup email email
</VirtualHost>
}

  1. Languages

Mkdir/web

mkdir /var/www/extsuite
tar zxf extman-1.1.tar.gz -C /var/www/extsuite/
tar zxf extmail-1.2.tar.gz -C /var/www/extsuite/
cd /var/www/extsuite/
mv extmail-1.2/ extmail
mv extman-1.1/ extman


(保留)host jingli

二. 安装MUA,包括dovecot,
yum install -y dovecot dovecot-mysql

SENDMAIL 端口25

在/mnt下的文件就是服务器上的文件

}

/etc/init.d/httpd restart
登录mail.extmail.org会出现一些问题:解决:
yum install perl-CGI -y
下载:Unix-Syslog-1.1.tar.gz
tar zxf Unix-Syslog-1.1.tar.gz
cd Unix-Syslog-1.1
yum install perl-ExtUtils-MakeMaker -y
perl Makefile.PL

 

              虚拟用户

四.安装mysql图形化工具
yum install -y http php php-mysql
下载phpMyAdmin-3.4.0-all-languages.tar.bz2
tar jxf phpMyAdmin-3.4.0-all-languages.tar.bz2
cp -r phpMyAdmin-3.4.0-all-languages /var/www/html/phpadmin
cd /var/www/html/phpadmin/
cp config.sample.inc.php config.inc.php
vim config.inc.php
{
$cfg['blowfish_secret'] = 'westos';
}
/etc/init.d/httpd start

 

禁止ping : iptables –A INPUT –p icmp –jDROP

环境:rhel6.4 iptables and selinux disables

重新啟動 Apache:
# /etc/init.d/httpd restart

showdatebeses 进行查看服务器的信息

chown -R email.email cgi/

添加验证码:
下载perl-GD-2.45-1.el6.rfx.x86_64.rpm
yum localinstall perl-GD-2.45-1.el6.rfx.x86_64.rpm
在webman.cf中设置验证码的长度:

LANG="zh_CN.GB18030"
LANGUAGE="zh_CN.GB18030:zh_CN.GB2312:zh_CN"
SUPPORTED="zh_CN.GB18030:zh_CN:zh:en_US.UTF-8:en_US:en"
SYSFONT="lat0-sun16"

改其属主/组为ftp :chmod ftp:ftp /pub

五.配置:
1.postfix
vim main.cf
{
inet_protocols = ipv4
inet_interfaces = all
}
2.mysql
/etc/init.d/mysqld start
chkconfig mysqld on
mysql_secure_installation --> westos
将extmail 的extmail.sql和init.sql导入数据库
vim init.sql{修改postmaster的密码:postmaster;root的密码:westos}
mysql -uroot -pwestos < extmail.sql
mysql -uroot -pwestos < init.sql
与postfix链接
postconf -e virtual_uid_maps=static:800
postconf -e virtual_gid_maps=static:800
postconf -e virtual_mailbox_base=/home/email/

 

改Security=share

}

extmail
cp webmail.cf.default webmail.cf

webmail主配文件
vim /var/www/extmail/webmail.cf
{
SYS_AUTH_TYPE = mysql
SYS_MAILDIR_BASE = /home/email
SYS_CRYPT_TYPE = plain
SYS_MYSQL_USER = extmail
SYS_MYSQL_PASS = extmail
SYS_MYSQL_DB = extmail
SYS_MYSQL_HOST = localhost
SYS_MYSQL_SOCKET = /var/lib/mysql/mysql.sock

 

查看:smbclient –L //192.168.1.111(     windows ip) –U administrator

3.postfix,dovecot.extmail与mysql关联

cd /etc/dovecot/
vim conf.d/10-auth.conf
{
!include auth-sql.conf.ext
}
在/usr/share/doc/dovecot-2.0.9/example-config

cp dovecot-sql.conf.ext /etc/dovecot/
cd /etc/dovecot
vim dovecot-sql.conf.ext
{
driver = mysql
connect = host=localhost dbname=extmail user=extmail password=extmail
default_pass_scheme = plain
password_query =
SELECT username, domain, password
FROM mailbox WHERE username = '%u'
user_query = SELECT maildir, 800 AS uid, 800 AS gid FROM mailbox WHERE username = '%u'
}
vim /etc/dovecot/dovecot.conf
{ listen = * }

添加email用户,id=800
useradd -u 800 email
vim conf.d/10-mail.conf
{
mail_location = maildir:/home/email/%d/%n/Maildir
first_valid_uid = 800

D.  Set pre-defined settings for specific IMAP servers

       内容全部用#注释

chkconfig httpd on

Yum install bind* -y

# /etc/init.d/mysqld restart

     Allow from 192.168.0.100

chkconfig dovecot on

Mkdir/web2

vi /etc/vsftpd/vsftpd.conf

安装:yum install samba* -y

chmod 777 /var/ftp/pub

              #viifcfg-eth1

 

       创建目录:mkdir /filepub

m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

修改上下文 chcon –R –t httpd_sys_content_t/web

# /etc/init.d/mysqld stop

 

yum -y install dovecot.i*

ftp服务

首先编辑/etc/mail/sendmail.mc文件,去掉前面的注释

 改家目录  即:/home/aaa   /web1

chmod 755 /var/ftp/

Web

最后在/etc/mail/local-host-names文件中添加上本机的域名

  网页步骤


最后在[public]中加browseable=yes

setenforce 0

DNS


能发邮件Yum install sendmail* -y

MySQL(root用户)密码忘记重置
mysql YUM 安装路径rpm -ql mysql (usr/bin)

       添加网卡

vi /etc/sysconfig/i18n
将内容改为

发布ftp: ip: iptables –t nat –APREROUTING –d 222.222.222.222 –p tcp –dport 21 –j 192.168.1.2:21

 

允许防火墙本机对外开放tcp端口20,21,25,110及被动模式FTP端口1250-1280

可以添加用户 如 useradd ftpuser -M -d /var/ftp/pub

 改DocumentBoot “/web” 默认为/var/www/html

2)

Domainname abc,com

chroot_local_user=YES
#chroot_list_enable=YES

vi /etc/hosts

D->courier->S->Q

查看ping abc.com

将DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl 的127.0.0.1 改为0.0.0.0

#vi /var/named/abc.com.zone

打开saslauthd服务

              123

chkconfig vsftpd on

改属主/组:Chown nobody:nobody /pub

执行

Vi abc.com.zone

Command >>  D

启动服务:/etc.init.d/ypbind start

永久禁止:

在自创目录下建立网站

 

选择2 即:/usr/sbin/sendmail.sendmail


Setsebool-P allow_ftp_full_access on

squirrelmail

改:nex.ipv4_forward=1

 

#vi /etc/exports

yum -y install sendmail-cf.i* sendmail-doc.i*

vi /etc/yp.conf

 

 

service dovecot restart

mount.nfs 192.168.1.111:/filepub /mnt

yum install squirrelmail

 

Poppassd 安裝程序

首先安装gcc

yum install gcc

  

cd /usr/share/squirrelmail/plugins

wget http://www.squirrelmail.org/plugins/change_pass-2.7a-1.4.x.tar.gz

tar -zxvf change_pass-2.7a-1.4.x.tar.gz

/usr/share/squirrelmail/config/conf.pl

選 8.  Plugins -> 將 Available Plugins: 內的 change_pass 加入模組 -> 選 S 儲存設定 -> 選 Q 後離開

service httpd restart

 

cd /usr/share/squirrelmail/plugins/change_pass
mkdir poppassd
cd poppassd
wget ftp://netwinsite.com/pub/poppassd/poppassd.c

gcc poppassd.c -o poppassd –lcrypt

 

vi /etc/services

:
# (due to a bug in inetd the 3com-tsmux line is disabled)
3com-tsmux      106/tcp         poppassd   去掉此行注释
#3com-tsmux     106/udp         poppassd
:

 

cd /etc/xinetd.d/
vi poppassd 

 

加入:

service poppassd
{
        flags           = REUSE
        socket_type     = stream
        wait            = no
        user            = root
        server          = /usr/share/squirrelmail/plugins/change_pass/poppassd/poppassd
        server_args     =
        log_on_failure  += USERID
        disable         = no
}

 

service xinetd restart  

如未安装的话需要安装xinetd 

yum install xinetd

service xinetd restart

chkconfig xinetd on

 

测试:

telnet localhost 106

[root@localhost xinetd.d]# telnet localhost 106
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
200 localhost.localdomain poppassd v1.6a hello, who are you?

              [public]后每句前:去掉

service vsftpd start

Default-lease-time 21600;

mysql> FLUSH PRIVILEGES;

ftp服务、Nfs服务和Nis服务

设置防火墙 (略)

   /filepub      192.168.1.0/24(rw,no_root_squash)服务器ip


基于名字的虚拟主机

语言:10->zh_CN

       <VirtualHost * 80>

乱码问题

#chmod o+rwx /pub

限定用户目录的话设置

禁止外部某台telnet :iptables –A FORWARD –S222.222.222.222 –p tcp –dport 23 –j DROP

 

反向 zone “0.168.192.in-adar arpa” zn{

Dovecot常规配置   端口110

100    PTR   mail.abc.com

设置Apache 端口80

Echo “modprobenf_nat_ftp” > /etc/rc.modules

如果要使用linux自己的用户登录

100    PTR   www.abc.com

1)

mysql进入查看

 

{

chkconfig sendmail on

重新输入配置文件:exportfs -rv

 

Option domain-name             “abc.com”;

MYSQL 端口3306

调用host文件

方法:

清空规则 iptables -F

mysql> UPDATE user SET Password=PASSWORD('newpassword') where USER='root';

能发邮件Yum install sendmail* -y

 

  改:DocumentBoot“/var/www/html/upload”

Main Menu –
1.  Organization Preferences
2.  Server Settings
3.  Folder Defaults
4.  General Options
5.  Themes
6.  Address Books
7.  Message of the Day (MOTD)
8.  Plugins
9.  Database

  改net.ipv4=1

 

退出设密码

Enter password: <输入新设的密码newpassword>

Chkconfigsasauthd on

 

#vi/var/www/htm/index.html

yum -y install httpd php mysql mysql-server php-mysql httpd-manual mod_ssl mod_perl mod_auth_mysql php-mcrypt php-gd php-xml php-mbstring php-ldap php-pear php-xmlrpc mysql-connector-odbc mysql-devel libdbi-dbd-mysql

vi/etc/php.ini

注意复制文件时 末尾的空格是不需要的!

Yuminstall dovecot* -y

修改/etc/selinux/config文件中的SELINUX="" 为 disabled ,然后重启。

              改Path=/pub

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'rootpasswd' WITH GRANT OPTION; ///输入这段指令并回车后允许所有用root用户并且输入rootpasswd密码的主机登入该mysql Server 如果将'%'换成'10.1.1.1'那么只有10.1.1.1的主机可以登陆.

chkconfigmysqld on

# mysql -u root mysql

#i /etc/sysctl.conf

anonymous_enable=YES
local_enable=YES
write_enable=YES
local_umask=022
anon_upload_enable=YES
anon_mkdir_write_enable=YES
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
#chown_uploads=YES
#chown_username=whoever
#xferlog_file=/var/log/xferlog
#xferlog_std_format=YES
#idle_session_timeout=600
#data_connection_timeout=120
#nopriv_user=ftpsecure
#async_abor_enable=YES
#ascii_upload_enable=YES
#ascii_download_enable=YES
#ftpd_banner=Welcome to blah FTP service.
#deny_email_enable=YES
#banned_email_file=/etc/vsftpd/banned_emails

       #vi /etc/samba/smb.conf

chkconfig mysqld on

Htpasswd –c/etc/httpd/userpasswd aaa

# mysql -uroot -p

禁止其他主机ping 防火墙 但防火墙能ping 其他

关闭SELinux

         Connect abc.com       RELAY

service httpd start

Range dynamic-bootp  192.168.0.10  192.168.0.100;

 

           Type master;

mysql> quit

  Yum install dovecot* -y

配置VSFTPD 端口21 20 50000-60000

Iptables –AINPUT –p icmp –icmp-type Echo-Request –j DROP


                Passwd aaa

 

                              };

chroot_local_user=YES

        AuthType Basic

C   Turn color off
S   Save data
Q   Quit

df –h /mnt 查询


启动服务

/usr/share/squirrelmail/config/conf.pl

Lamp

yum install vsftpd

 

# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &

Cp php…/usr/local/src

vi /etc/dovecot.conf,只需取消改行注释 protocols=imap imaps pop3 pop3s

       Useradd aaa

service saslauthd start

Iptables –AFORWARD –m mac –mac-source 00:01:02:03:04:05 –j DROP

 

       NIS_DOMAIN=abc.com

选择2 即:/usr/sbin/sendmail.sendmail

接收邮件

 

           Hardware Ethernet00:0c:29:63:ac:1c;(主机max)

停用postfix : /etc/int.d/postfix stop

查看时服务器上在/filepub中,客户端在/mnt中

Iptables –AINPUT –p icmp –icmp-type destination-unreachable –j ACCEPT

echo “/etc.init.d/ypbind start” >> /etc/rc.local

Makeabc.crt

安装:Rpm –ivh pptpd-1.3.4-2.el6.i686

查看:ll –Z

              User1用户名

                或Service vsftpd restart

安装:Yum install httpd* -y

                             Fiel “abc.com.zone”;

  account     required      pam_userdb.so db=/etc/vsftpd/vuser

 

  Allow-query{ any; }

Option time-offset                -18000;

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