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| Section | Objectives |
|---|---|
| Manage users and groups | - Create, delete, and modify local user accounts - Change passwords and adjust password aging for local users - Create, delete, and modify local groups and group memberships - Configure privileged access |
| Deploy, configure, and maintain systems | - Schedule tasks using at, cron, and systemd timer units - Configure systems to boot into a specific target automatically - Start and stop services and configure services to start automatically at boot - Configure time service clients - Install and update software packages - Modify the system bootloader |
| Manage software | - Configure access to Flatpak repositories - Install and remove RPM software packages - Install and remove Flatpak software packages - Configure access to RPM repositories |
| Manage security | - Configure key-based authentication for SSH - List and identify SELinux file and process contexts - Configure firewall settings using firewall-cmd and firewalld - Set enforcing and permissive modes for SELinux - Manage SELinux port labels - Restore default file contexts - Use Boolean settings to modify SELinux settings - Manage default file permissions |
| Create simple shell scripts | - Conditionally execute code - Process script inputs - Process output of shell commands within a script - Use looping constructs to process files and command-line input |
| Operate running systems | - Securely transfer files between systems - Manage tuning profiles - Boot systems into different targets manually - Preserve system journals - Locate and interpret system log files and journals - Adjust process scheduling - Boot, reboot, and shut down a system normally - Start, stop, and check the status of network services - Interrupt the boot process to gain access to a system - Identify CPU and memory intensive processes and kill processes |
| Manage basic networking | - Configure hostname resolution - Restrict network access using firewalld and firewall-cmd - Configure IPv4 and IPv6 addresses - Configure network services to start automatically at boot |
| Create and configure file systems | - Configure autofs - Mount and unmount network file systems using NFS - Diagnose and correct file permission problems - Create, mount, unmount, and use VFAT, ext4, and XFS file systems - Extend existing logical volumes |
| Understand and use essential tools | - Access remote systems using SSH - Use input-output redirection - Create hard and soft links - Create and edit text files - Use grep and regular expressions to analyze text - Log in and switch users in multi-user targets - Locate, read, and use system documentation - Create, delete, copy, and move files and directories - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - List, set, and change standard ugo/rwx permissions - Access a shell prompt and issue commands with correct syntax |
| Configure local storage | - Add new partitions, logical volumes, and swap non-destructively - Configure systems to mount file systems at boot by UUID or label - Create and delete logical volumes - Assign physical volumes to volume groups - Create and remove physical volumes - List, create, and delete partitions on GPT disks |
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NEW QUESTION # 39
We are working on /data initially the size is 2GB. The /dev/test0/lvtestvolume is mount on /dat a. Now you required more space on /data but you already added all disks belong to physical volume. You saw that you have unallocated space around 5 GB on your harddisk. Increase the size of lvtestvolume by 5GB.
Answer:
Explanation:
Create a partition having size 5 GB and change the syste id '8e'.
use partprobe command
pvcreate /dev/hda9 Suppose your partition number is hda9.
vgextend test0 /dev/hda9 vgextend command add the physical disk on volume group.
lvextend -L+5120M /dev/test0/lvtestvolume
verify using lvdisplay /dev/test0/lvtestvolume.
NEW QUESTION # 40
CORRECT TEXT
Configure autofs to make sure after login successfully, it has the home directory autofs, which is shared as /rhome/ldapuser40 at the ip: 172.24.40.10. and it also requires that, other ldap users can use the home directory normally.
Answer:
Explanation:
# chkconfig autofs on
# cd /etc/
# vim /etc/auto.master
/rhome /etc/auto.ldap
# cp auto.misc auto.ldap
# vim auto.ladp
ldapuser40 -rw,soft,intr 172.24.40.10:/rhome/ldapuser40
* -rw,soft,intr 172.16.40.10:/rhome/&
# service autofs stop
# server autofs start
# showmount -e 172.24.40.10
# su - ladpuser40
NEW QUESTION # 41
Create one partitions having size 100MB and mount it on data.
Answer:
Explanation:
1. Use fdisk /dev/hda to create new partition.
2. Type n For New partitions.
3. It will ask for Logical or Primary Partitions. Press l for logical.
4. It will ask for the Starting Cylinder: Use the Default by pressing Enter Key.
5. Type the Size: +100M you can specify either Last cylinder of size here.
6. Press P to verify the partitions lists and remember the partitions name.
7. Press w to write on partitions table.
8. Either Reboot or use partprobe command.
9. Use mkfs -t ext3 /dev/hda?
OR
mke2fs -j /dev/hda? To create ext3 filesystem.
vi /etc/fstab
Write:
/dev/hda? /data ext3 defaults 1 2
Verify by mounting on current Sessions also: mount /dev/hda? /data
NEW QUESTION # 42
Create a volume group with a physical extent size of 16 MB and create a logical volume using 30 extents.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
pvcreate /dev/sdb3
vgcreate -s 16M VG1 /dev/sdb3
lvcreate -l 30 -n LV1 VG1
mkfs.ext4 /dev/VG1/LV1
Detailed Explanation:
* vgcreate -s 16M sets PE size to 16 MB.
* lvcreate -l 30 allocates 30 extents.
* 30 x 16 MB = 480 MB total LV size.
* mkfs.ext4 creates the filesystem.
NEW QUESTION # 43
What implications does container virtualization have for DevOps? (Choose two answers.)
Answer: B,E
Explanation:
Explanation/Reference:
Reference http://anandmanisankar.com/posts/container-docker-PaaS-microservices/
NEW QUESTION # 44
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