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Question 1:
Create the user named eric and deny to interactive login.
Correct Answer: Check the anser in explanation.
useradd eric
passwd eric
vi /etc/passwd
eric:x:505:505::/home/eric:/sbin/nologin
Which shell or program should start at login time is specified in /etc/passwd file? By default, Redhat Enterprise Linux assigns the /bin/bash shell to the users. To deny the interactive login, you should write /sbin/nologin or /bin/ false instead of login shell.
Question 2:
You are a System administrator. Using Log files very easy to monitor the system. Now there are 50 servers running as Mail, Web, Proxy, DNS services etc. You want to centralize the logs from all servers into on LOG Server. How will you configure the LOG Server to accept logs from remote host?
Correct Answer: Check the anser in explanation.
By default, system accept the logs only generated from local host. To accept the Log from other host configure: vi /etc/sysconfig/syslog SYSLOGD_OPTIONS=”-m 0 -r” Where -m 0 disables \’MARK\’ messages. -r enables logging from remote machines -x disables DNS lookups on messages received with -r service syslog restart
Question 3:
Configure
a HTTP server, which can be accessed through http://station.domain40.example.com.
Please
download the released page from http://ip/dir/example.html.
Correct Answer: Check the anser in explanation.
# yum install -y httpd # chkconfig httpd on # cd /var/www/html # wget http://ip/dir/example.html # cp example.com index.html # vim /etc/httpd/conf/httpd.conf NameVirtualHost 192.168.0.254:80 DocumentRoot /var/www/html/ ServerName station.domain40.example.com
Question 4:
Add an additional swap partition of 754 MB to your system.
The swap partition should automatically mount when your system boots.
Do not remove or otherwise alter any existing swap partitions on your system.
Correct Answer: Check the anser in explanation.
fdisk -l fdisk -cu /dev/vda p n e or p select e default (first): enter default (last): enter n default(first): enter default(first): 754M t (1-5)
l: 82 p w #reboot #mkswap /dev/vda5
vim /etc/fstab /dev/vda5 swap swap defaults 0 0 wq
mount -a
swapon -a
swapon -s
Question 5:
1.
Find all sizes of 10k file or directory under the /etc directory, and copy to /tmp/findfiles directory.
2.
Find all the files or directories with Lucy as the owner, and copy to /tmp/findfiles directory.
Correct Answer: Check the anser in explanation.
(1)find /etc -size 10k -exec cp {} /tmp/findfiles \;
(2)find / -user lucy -exec cp -a {} /tmp/findfiles \;
Note: If find users and permissions, you need to use cp – a options, to keep file permissions and user attributes etc.
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Question 6:
Your System is configured in 192.168.0.0/24 Network and your nameserver is 192.168.0.254. Make successfully resolve to server1.example.com.
Correct Answer: Check the anser in explanation.
nameserver is specified in question,
1.
Vi /etc/resolv.conf nameserver 192.168.0.254
2.
host server1.example.com
Question 7:
Create a Shared Directory.
Create a shared directory /home/admins, make it has the following characteristics:
/home/admins belongs to group adminuser
This directory can be read and written by members of group adminuser Any files created in /home/ admin, group automatically set as adminuser.
Correct Answer: Check the anser in explanation.
mkdir /home/admins chgrp -R adminuser /home/admins chmodg w /home/admins chmodg s /home/admins
Question 8:
A YUM source has been provided in the http://instructor.example.com/pub/rhel6/dvd Configure your system and can be used normally.
Correct Answer: Check the anser in explanation.
/etc/yum.repos.d/base.repo [base] name=base baseurl=http://instructor.example.com/pub/rhel6/dvd gpgcheck=0 yum list
Question 9:
Configure autofs to automount the home directories of LDAP users as follows:
host.domain11.example.com NFS-exports /home to your system.
This filesystem contains a pre-configured home directory for the user ldapuser11 ldapuser11\’s home directory is host.domain11.example.com /rhome/ldapuser11 ldapuser11\’s home directory should be automounted locally beneath /rhome
as /rhome/ldapuser11
Home directories must be writable by their users
ldapuser11\’s password is \’password\’.
Correct Answer: Check the anser in explanation.
vim /etc/auto.master /rhome /etc/auto.misc wq! # vim /etc/auto.misc ldapuser11 –rw,sync host.domain11.example.com:/rhome/ldpauser11 :wq! #service autofs restart
service autofs reload
chkconfig autofs on
su -ldapuser11 Login ldapuser with home directory # exit
Question 10:
The system ldap.example.com provides an LDAP authentication service. Your system should bind to this service as follows: The base DN for the authentication service is dc=domain11, dc=example, dc=com LDAP is used to provide both account information and authentication information. The connection should be encrypted using the certificate at http:// host.domain11.example.com/pub/domain11.crt When properly configured, ldapuserX should be able to log into your system, but will not have a home directory until you have completed the autofs requirement. Username: ldapuser11 Password: password
Correct Answer: Check the anser in explanation.
system-config-authentication LDAP user DN=dc=domain11,dc=example,dc=com Server=host.domain11.example.com Certificate= http://host.domain11.example.com/pub/domain11.crt (enter url carefully, there maybe // or ..) LDAP password OK starting sssd
su -ldapuser11 Display Bash prompt #exit
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