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| Section | Objectives |
|---|---|
| Configure local storage | - Logical volumes - Physical volumes - Volume groups - File system mounting using UUID or labels - GPT disk partitions - Adding partitions, logical volumes, and swap |
| Operate running systems | - Process monitoring and termination - Interrupt the boot process - Process scheduling - Network services - Tuning profiles - System logs and journals - Boot, reboot, and shut down systems - Secure file transfer - Boot systems into different targets |
| Create and configure file systems | - File permission troubleshooting - Autofs - VFAT, ext4, and XFS file systems - NFS file systems - Extending logical volumes |
| Deploy, configure, and maintain systems | - Bootloader configuration - Time service clients - Default boot target configuration - Task scheduling with at, cron, and systemd timers - Software installation and updates - Service management |
| Manage software | - Configure RPM repositories - Install and remove Flatpak packages - Install and remove RPM packages - Configure Flatpak repositories |
| Manage users and groups | - Privileged access configuration - Local user account management - Password and password aging management - Local group management |
| Create simple shell scripts | - Conditional execution - Processing command output - Looping constructs - Processing script inputs |
| Manage basic networking | - Network services at boot - Firewall configuration with firewalld and firewall-cmd - IPv4 and IPv6 configuration - Hostname resolution |
| Manage security | - SSH key-based authentication - SELinux file context restoration - SELinux Boolean settings - Default file permissions - SELinux port labels - SELinux file and process contexts - SELinux enforcing and permissive modes - Firewall configuration |
| Understand and use essential tools | - System documentation - Users and multi-user targets - Input and output redirection - Text analysis with grep and regular expressions - File archiving and compression - File permissions - Creating and editing text files - File and directory management - Hard and soft links - Shell access and command syntax - Remote system access using SSH |
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NEW QUESTION # 28
Create a volume group,and set 8M as a extends. Divided a volume group containing 50 extends on volume group lv (lvshare), make it as ext4 file system, and mounted automatically under /mnt/data. And the size of the floating range should set between 380M and 400M.
Answer:
Explanation:
Answer see in the explanation.
Explanation/Reference:
# fdisk
# partprobe
# pvcreate /dev/vda6
# vgcreate -s 8M vg1 /dev/vda6 -s
# lvcreate -n lvshare -l 50 vg1 -l
# mkfs.ext4 /dev/vg1/lvshare
# mkdir -p /mnt/data
# vim /etc/fstab
/dev/vg1/lvshare /mnt/data ext4 defaults 0 0
# mount -a
# df -h
NEW QUESTION # 29
Change the logical volume capacity named vo from 190M to 300M. and the size of the floating range should set between 280 and 320. (This logical volume has been mounted in advance.)
Answer:
Explanation:
Answer see in the explanation.
Explanation/Reference:
# vgdisplay
(Check the capacity of vg, if the capacity is not enough, need to create pv , vgextend , lvextend)
# lvdisplay (Check lv)
# lvextend -L +110M /dev/vg2/lv2
# resize2fs /dev/vg2/lv2
mount -a
(Verify)
------------------------------------------------------------------------------- (Decrease lvm)
# umount /media
# fsck -f /dev/vg2/lv2
# resize2fs -f /dev/vg2/lv2 100M
# lvreduce -L 100M /dev/vg2/lv2
# mount -a
# lvdisplay (Verify)
OR
# e2fsck -f /dev/vg1/lvm02
# resize2fs -f /dev/vg1/lvm02
# mount /dev/vg1/lvm01 /mnt
# lvreduce -L 1G -n /dev/vg1/lvm02
# lvdisplay (Verify)
NEW QUESTION # 30
Add users: user2, user3.
The Additional group of the two users: user2, user3 is the admin group Password: redhat
Answer:
Explanation:
see explanation below.
Explanation
# useradd -G admin user2
# useradd -G admin user3
# passwd user2
redhat
# passwd user3
redhat
NEW QUESTION # 31
Create a user harry, set the password to expire every 30 days, and force a password change on first login.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
useradd harry
passwd harry
chage -M 30 -d 0 harry
chage -l harry
Detailed Explanation:
* useradd harry creates the local user.
* passwd harry sets the initial password.
* chage -M 30 sets the maximum password age to 30 days.
* chage -d 0 forces the user to change the password at next login.
* chage -l harry verifies the policy.
NEW QUESTION # 32
SIMULATION
Configure your Host Name, IP Address, Gateway and DNS.
Host name: dtop5.dn.ws.com
IP Address: 172.28.10.5/4
Gateway: 172.28.10.1
DNS: 172.28.10.1
Answer:
Explanation:
See explanation below.
Explanation/Reference:
Explanation:
1. Configure Host Name
vim /etc/sysconfig/network NETWORKING=yes HOSTNAME=dtop5.dn.ws.com GATEWAY=172.28.10.1
2. Configure IP Address, Gateway and DNS
Configure the network by Network Manager:
Note: Please remember to choose two options:
Connect automatically
Available to all users
Click "Apply", save and exit, and restart your network services:
# Service network restart
3. Validate these profiles:
a) Check gateway: # vim / etc / sysconfig / network
NETWORKING=yes
HOSTNAME=dtop5.dn.ws.com
GATEWAY=172.28.10.1
b) Check Host Name: # vim /etc/hosts
c) Check DNS: # vim /etc/resolv.conf
# Generated by NetworkManager
Search dn.ws.com
Nameserver 172.28.10.1
d) Check Gateway: # vim /etc/sysconfig/network-scripts/ifcfg-eth0
NEW QUESTION # 33
......
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