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| Section | Weight | Objectives |
|---|---|---|
| Create and configure file systems | 15% | - Mount and manage network file systems (NFS, autofs) - Create and mount XFS, ext4, VFAT file systems - Maintain entries in /etc/fstab using UUID or labels - Manage access control lists (ACLs) |
| Perform basic shell scripting | - Use conditional statements, loops, and script inputs | |
| Deploy, configure, and maintain systems | 15% | - Manage network interfaces and settings with NetworkManager/nmcli - Configure firewalld firewall rules - Manage software packages with DNF/YUM |
| Operate running systems | 20% | - Maintain accurate system time with chrony - Schedule tasks using cron and at - Boot systems into different targets; manage systemd units - Manage logging and journaling - Manage networking and network services |
| Configure local storage | 15% | - Create and manage LVM physical volumes, volume groups, logical volumes - Configure swap space - List, create, delete partitions and GPT/MBR layouts |
| Manage users and groups | 10% | - Configure SSH key-based authentication - Create, delete, modify users and groups - Manage password policies and sudo access |
| Understand and use essential tools | 25% | - Use grep and regular expressions - Access remote systems via SSH - Archive, compress, unpack files using tar, gzip, bzip2 - Create/edit text files; manage files, directories, links, permissions - Access shell prompt and issue commands with correct syntax - Use input-output redirection |
| Manage security | 10% | - Restore file contexts and troubleshoot SELinux issues - Enforce SELinux modes, contexts, booleans, and port labeling |
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NEW QUESTION # 50
SIMULATION
Configure the NTP service in your system.
Answer:
Explanation:
See explanation below.
Explanation/Reference:
Explanation: system-config-date &
NEW QUESTION # 51
Create a 512M partition, make it as ext4 file system, mounted automatically under /mnt/data and which take effect automatically at boot-start.
Answer:
Explanation:
see explanation below.
Explanation
# fdisk /dev/vda
n
+512M
w
# partprobe /dev/vda
# mkfs -t ext4 /dev/vda5
# mkdir -p /data
# vim /etc/fstab
/dev/vda5 /data ext4 defaults 0 0
# mount -a
NEW QUESTION # 52
One Logical Volume named lv1 is created under vg0. The Initial Size of that Logical Volume is 100MB. Now you required the size 500MB. Make successfully the size of that Logical Volume 500M without losing any data. As well as size should be increased online.
Answer:
Explanation:
see explanation below.
Explanation
The LVM system organizes hard disks into Logical Volume (LV) groups. Essentially, physical hard disk partitions (or possibly RAID arrays) are set up in a bunch of equal sized chunks known as Physical Extents (PE). As there are several other concepts associated with the LVM system, let's start with some basic definitions:
Physical Volume (PV) is the standard partition that you add to the LVM mix. Normally, a physical volume is a standard primary or logical partition. It can also be a RAID array.
Physical Extent (PE) is a chunk of disk space. Every PV is divided into a number of equal sized PEs. Every PE in a LV group is the same size. Different LV groups can have different sized PEs.
Logical Extent (LE) is also a chunk of disk space. Every LE is mapped to a specific PE.
Logical Volume (LV) is composed of a group of LEs. You can mount a file system such as /home and /var on an LV.
Volume Group (VG) is composed of a group of LVs. It is the organizational group for LVM. Most of the commands that you'll use apply to a specific VG.
* Verify the size of Logical Volume: lvdisplay /dev/vg0/lv1
* Verify the Size on mounted directory: df -h or df -h mounted directory name
* Use: lvextend -L+400M /dev/vg0/lv1
* ext2online -d /dev/vg0/lv1 to bring extended size online.
* Again Verify using lvdisplay and df -h command.
NEW QUESTION # 53
Add user: user1, set uid=601
Password: redhat
The user's login shell should be non-interactive.
Answer:
Explanation:
see explanation below.
Explanation
# useradd -u 601 -s /sbin/nologin user1
# passwd user1
redhat
NEW QUESTION # 54
Configure autofs
Configure autofs to automatically mount the home directory of a remote user as described below:
- materials.example.com (172.25.254.254) exports /rhome via NFS to your system. This filesystem contains a pre-configured home directory for the user remoteuser1.
- The home directory of remoteuser1 is materials.example.com:/rhome/remoteuser1.
- The home directory of remoteuser1 should be automatically mounted locally at /rhome/remoteuser1.
- The home directory must be writable by the user.
- The password for remoteuser1 is "flectrag".
Answer:
Explanation:
# Preparations (not required for the exam)
# Go back to foundation0, remote into classroom, create the remoteuser1 user and directory.
# This step is necessary to avoid issues with autofs mounting during testing.
[kiosk@foundation0 ~]$ ssh root@classroom 'useradd -u 1010 remoteuser1 && mkdir -p /rhome/remoteuser1 && chown remoteuser1: /rhome/remoteuser1'
# Install nfs-utils and autofs
[root@node1 ~]# yum -y install nfs-utils autofs
[root@node1 ~]# vim /etc/auto.master
/rhome /etc/auto.rhome
[root@node1 ~]# vim /etc/auto.rhome
remoteuser1 -rw materials.example.com:/rhome/remoteuser1
[root@node1 ~]# systemctl enable --now autofs
# Verification
[root@node1 ~]# ll /rhome/
[root@node1 ~]# ssh remoteuser1@localhost
remoteuser1@localhost\'s password: `flectrag`
$ pwd
/rhome/remoteuser1
$ touch my.file
$ mount | grep rhome
...
materials.example.com:/rhome/remoteuser1 on /rhome/remoteuser1 type nfs4 (`rw`,relatime,vers=4.2,rsize=131072,wsize=131072,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.25.250.100,local_lock=none,addr=172.25.254.254)
NEW QUESTION # 55
......
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