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| Section | Weight | Objectives |
|---|---|---|
| Manage security | 10% | - Enforce SELinux modes, contexts, booleans, and port labeling - Restore file contexts and troubleshoot SELinux issues |
| Perform basic shell scripting | - Use conditional statements, loops, and script inputs | |
| Create and configure file systems | 15% | - Mount and manage network file systems (NFS, autofs) - Manage access control lists (ACLs) - Maintain entries in /etc/fstab using UUID or labels - Create and mount XFS, ext4, VFAT file systems |
| Understand and use essential tools | 25% | - Use input-output redirection - Use grep and regular expressions - Access remote systems via SSH - Archive, compress, unpack files using tar, gzip, bzip2 - Access shell prompt and issue commands with correct syntax - Create/edit text files; manage files, directories, links, permissions |
| Configure local storage | 15% | - Configure swap space - List, create, delete partitions and GPT/MBR layouts - Create and manage LVM physical volumes, volume groups, logical volumes |
| Deploy, configure, and maintain systems | 15% | - Configure firewalld firewall rules - Manage network interfaces and settings with NetworkManager/nmcli - Manage software packages with DNF/YUM |
| Operate running systems | 20% | - Manage logging and journaling - Boot systems into different targets; manage systemd units - Maintain accurate system time with chrony - Manage networking and network services - Schedule tasks using cron and at |
| Manage users and groups | 10% | - Configure SSH key-based authentication - Manage password policies and sudo access - Create, delete, modify users and groups |
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NEW QUESTION # 27
Search a String
Find out all the columns that contains the string seismic within /usr/share/dict/words, then copy all these columns to /root/lines.tx in original order, there is no blank line, all columns must be the accurate copy of the original columns.
Answer:
Explanation:
see explanation below.
Explanation
grep seismic /usr/share/dict/words> /root/lines.txt
NEW QUESTION # 28
Reset the root password from the boot process.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
* Reboot the system.
* Interrupt GRUB boot.
* Press e to edit the boot entry.
* On the linux line, append:
rd.break
* Boot with Ctrl+x.
* At the emergency shell:
mount -o remount,rw /sysroot
chroot /sysroot
passwd root
touch /.autorelabel
exit
exit
Detailed Explanation:
* rd.break drops you into an early emergency environment.
* /sysroot contains the real root filesystem.
* mount -o remount,rw /sysroot makes it writable.
* chroot /sysroot changes into the installed system.
* passwd root resets the password.
* touch /.autorelabel is critical so SELinux relabels files on next boot.
NEW QUESTION # 29
You have a domain named www.rhce.com associated IP address is 192.100.0.2. Configure the Apache web server by implementing the SSL for encryption communication.
Answer:
Explanation:
see explanation below.
Explanation
* vi /etc/httpd/conf.d/ssl.conf <VirtualHost 192.100.0.2> ServerName www.rhce.com DocumentRoot
/var/www/rhce DirectoryIndex index.html index.htm ServerAdmin webmaster@rhce.com SSLEngine on SSLCertificateFile /etc/httpd/conf/ssl.crt/server.crt SSLCertificateKeyFile
/etc/httpd/conf/ssl.key/server.key </VirtualHost>
* cd /etc/httpd/conf
3 make testcert
* Create the directory and index page on specified path. (Index page can download from ftp://server1.example.com at exam time)
* service httpd start|restart
* chkconfig httpd on
Apache can provide encrypted communications using SSL (Secure Socket Layer). To make use of encrypted communication, a client must request to https protocol, which is uses port 443. For HTTPS protocol required the certificate file and key file.
NEW QUESTION # 30
15. Add sudo Permission Configuration
Allow members of the sysmgrs group to use sudo without entering a password.
Answer:
Explanation:
Solution:
[root@node1 ~]# visudo
...
%wheel ALL=(ALL) NOPASSWD: ALL
%sysmgrs ALL=(ALL) NOPASSWD: ALL
# Verification (mandatory operation)
[root@node1 ~]# su - natasha
[natasha@node1 ~]# sudo cat /etc/shadow
NEW QUESTION # 31
According the following requirements, configure autofs service and automatically mount to user's home directory in the ldap domain.
- Instructor.example.com (192.168.0.254) has shared /home/guests/ldapuserX home directory to your system by over NFS export, X is your hostname number.
- LdapuserX's home directory is exist in the instructor.example.com: /home/ guests/ldapuserX
- LdapuserX's home directory must be able to automatically mount to /home/ guests/ldapuserX in your system.
- Home directory have write permissions for the corresponding user.
However, you can log on to the ldapuser1 - ldapuser99 users after verification. But you can only get your corresponding ldapuser users. If your system's hostname is server1.example.com, you can only get ldapuser1's home directory.
Answer:
Explanation:
see explanation below.
Explanation
mkdir -p /home/guests
cat /etc/auto.master:
/home/guests /etc/auto.ldap
cat /etc/auto.ldap:
ldapuser1 -rw instructor.example.com:/home/guests/ldapuser1
* automatically mount all the user's home directory #* -rw instructor.example.com:/home/guests/&
NEW QUESTION # 32
......
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