Vendor: Red Hat Exam Code: EX300 Exam Name: Red Hat Certified Engineer - RHCE
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Exam Times: RHCE: Two hours.
Pass Scores: Total 300 points. Pass at 210 points.
Exam Environment: Take examinations on a real system with a pre-installed virtual machine. All exams must be completed in the virtual machine. Network must be well configured. If the network can not be accessed, you will not pass the exam. In the iptables configuration, if you need to refuse the access, please use “Reject”. (the default is set as ACCEPT.) Note:
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Question 1 Configure an email server domian30.example.com, and it requests to send and receive emails from the local server or the user harry can send or receive emails from network. The email of user harry is /var/spool/mail/harry. Please note: the DNS server has already been MX record
Answer: # yum install –y postfix # service postfix restart # chkconfig postfix on # vim /etc/postfix/main.cf inet_interfaces = all mydestination = example.com, domain30.example.com, localhost mynetworks = 172.16.30.0/24, 127.0.0.1/8 # services postfix restart Test： # netstat –tulnp |grep 25 # hostname # echo hello |mail –s “test”
[email protected] # cat /var/spool/mai/harry
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