SIMULATIONInstall the Kernel Upgrade.Install suitable kernel update from:http://server.domain11.example.com/pub/updates.Following requirements must be met:Updated kernel used as the default kernel of system start-up.The original kernel is still valid and can be guided when system starts up.
Answer(s): A
Using the browser open the URL in the question, download kernel file to root or home directory.uname –r// check the current kernel versionrpm –ivh kernel-*.rpmvi /boot/grub.conf// checkSome questions are: Install and upgrade the kernel as required. To ensure that grub2 is the default item for startup.Yum repo : http://content.example.com/rhel7.0/x86-64/errataORuname -r // check kernelYum-config-manager --add-repo=“http://content.example.com/rhel7.0/x86-64/ errata”Yum clean allYum list kernel// install directlyYum -y install kernel// stuck with it, do not pipe! Please do not pipe!Default enable new kernel grub2-editenv list// checkModify grub2-set-default “kernel full name”Grub2-mkconfig –o/boot/grub2/grub.cfg// Refresh
SIMULATIONBinding to an external validation server.System server.domain11.example.com provides a LDAP validation service, your system should bind to this service as required:Base DN of validation service is dc=example,dc=comLDAP is used for providing account information and validation information Connecting and using the certification of http://server.domain11.example.com/pub/EXAMPLE-CA-CERT to encryptAfter the correct configuration, ldapuser1 can log into your system, it does not have HOME directory until you finish autofs questions, ldapuser1 password is password.
yum -y install sssd authconfig-gtk krb5-workstation authconfig-gtk // open the graphical interfaceModify user account database to ldap, fill up DN and LDAP SERVER as questions required, use TLS to encrypt connections making tick, write http://server.domain11.example.com/pub/EXAMPLE-CA-CERT to download ca, authentication method choose ldap password.You can test if the ldapuser is added by the following command:Id ldapuser1Note: user password doesn’t not need to set
SIMULATIONConfigure NTP.Configure NTP service, Synchronize the server time, NTP server: classroom.example.com
Configure the client:Yum -y install chronyVim /etc/chrony.confAdd: server classroom.example.com iburstStart: systemctl enable chronydsystemctl restart chronydValidate: timedatectl status
SIMULATIONConfigure autofs.Configure the autofs automatically mount to the home directory of LDAP, as required: server.domain11.example.com use NFS to share the home to your system. This file system contains a pre configured home directory of user ldapuserX.Home directory of ldapuserX is:server.domain11.example.com /home/guests/ldapuserHome directory of ldapuserX should automatically mount to the ldapuserX of the local /home/guests Home directory’s write permissions must be available for users ldapuser1’s password is password
yum install -y autofsmkdir /home/rehome/etc/auto.master/home/rehome/etc/auto.ldapKeep then exitcp /etc/auto.misc /etc/auto.ldap/etc/auto.ldapldapuserX -fstype=nfs,rw server.domain11.example.com:/home/guests/Keep then exitsystemctl start autofssystemctl enable autofssu - ldapuserX// testIf the above solutions cannot create files or the command prompt is -bash-4.2$, it maybe exist multi-level directory, this needs to change the server.domain11.example.com:/home/guests/ to server.domain11.example.com:/home/guests/ldapuserX. What is multi-level directory? It means there is a directory of ldapuserX under the /home/guests/ldapuserX in the questions. This directory is the real directory.
SIMULATIONConfigure a user account.Create a user iar, uid is 3400. Password is redhat
useradd -u 3400 iarpasswd iar
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