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| Section | Objectives |
|---|---|
| Manage users and groups | - Local user account management - Local group management - Password and password aging management - Privileged access configuration |
| Manage basic networking | - Firewall configuration with firewalld and firewall-cmd - Network services at boot - Hostname resolution - IPv4 and IPv6 configuration |
| Manage software | - Install and remove Flatpak packages - Configure RPM repositories - Configure Flatpak repositories - Install and remove RPM packages |
| Operate running systems | - System logs and journals - Network services - Tuning profiles - Process monitoring and termination - Boot systems into different targets - Secure file transfer - Process scheduling - Boot, reboot, and shut down systems - Interrupt the boot process |
| Understand and use essential tools | - Text analysis with grep and regular expressions - Remote system access using SSH - Hard and soft links - File permissions - File archiving and compression - File and directory management - Shell access and command syntax - Creating and editing text files - System documentation - Input and output redirection - Users and multi-user targets |
| Manage security | - SELinux enforcing and permissive modes - SSH key-based authentication - Default file permissions - SELinux file context restoration - Firewall configuration - SELinux file and process contexts - SELinux Boolean settings - SELinux port labels |
| Create and configure file systems | - Extending logical volumes - Autofs - VFAT, ext4, and XFS file systems - NFS file systems - File permission troubleshooting |
| Configure local storage | - GPT disk partitions - File system mounting using UUID or labels - Logical volumes - Volume groups - Physical volumes - Adding partitions, logical volumes, and swap |
| Deploy, configure, and maintain systems | - Time service clients - Bootloader configuration - Task scheduling with at, cron, and systemd timers - Service management - Software installation and updates - Default boot target configuration |
| Create simple shell scripts | - Processing command output - Looping constructs - Conditional execution - Processing script inputs |
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NEW QUESTION # 49
Create a volume group, and set the size is 500M, the size of single PE is 16M. Create logical volume named lv0 in this volume group, set size is 20 PE, make it as ext3 file system, and mounted automatically under data.
Answer:
Explanation:
see explanation below.
Explanation
fdisk /dev/vda
pvcreate /dev/vda3
vgcreate -s 16M vg0 /dev/vda3
lvcreate -n lv0 -l 20 vg0
mkfs.ext3 /dev/mapper/vg0-lv0
mkdir /data
/etc/fstab:
/dev/mapper/vg0-lv0 /data ext3 defaults 0 0
mount -a
mount | grep data
NEW QUESTION # 50
CORRECT TEXT
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:
# 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 # 51
CORRECT TEXT
Configure a HTTP server, which can be accessed through http://station.domain40.example.com.
Please download the released page from http://ip/dir/example.html.
Answer:
Explanation:
# yum install -y httpd
# chkconfig httpd on
# cd /var/www/html
# wget http://ip/dir/example.html
# cp example.com index.html
# vim /etc/httpd/conf/httpd.conf
NameVirtualHost 192.168.0.254:80
<VirtualHost 192.168.0.254:80>
DocumentRoot /var/www/html/
ServerName station.domain40.example.com
</VirtualHost>
NEW QUESTION # 52
One Domain RHCE is configured in your lab, your domain server is server1.example.com. nisuser2001, nisuser2002, nisuser2003 user are created on your server 192.168.0.254:/rhome/stationx/nisuser2001. Make sure that when NIS user login in your system automatically mount the home directory. Home directory is separately shared on server /rhome/stationx/ where x is your Station number.
Answer:
Explanation:
use the authconfig --nisserver=<NIS SERVER> --nisdomain=<NIS DOMAIN> -- update Example: authconfig --niserver=192.168.0.254 --nisdomain=RHCE --update or system-config-authentication Click on Enable NIS Type the NIS Domain: RHCE Type Server 192.168.0.254 then click on next and ok You will get a ok message.
Create a Directory /rhome/stationx where x is your station number.
vi /etc/auto.master and write at the end of file /rhome/stationx /etc/auto.home --timeout=60 vi /etc/auto.home and write
* -rw,soft,intr 192.168.0.254:/rhome/stationx/&
Note: please specify your station number in the place of x.
Service autofs restart
Login as the nisuser2001 or nisuser2002 on another terminal will be Success. According to question, RHCE domain is already configured. We have to make a client of RHCE domain and automatically mount the home directory on your system. To make a member of domain, we use the authconfig with option or system-config authentication command. There a are lots of authentication server i.e NIS, LDAB, SMB etc. NIS is a RPC related Services, no need to configure the DNS, we should specify the NIS server address.
Here Automount feature is available. When user tried to login, home directory will automatically mount. The automount service used the /etc/auto.master file. On
/etc/auto.master file we specified the mount point the configuration file for mount point.
NEW QUESTION # 53
Open kmcrl value of 5 , and can verify in /proc/ cmdline
Answer:
Explanation:
# vim /boot/grub/grub.conf
kernel/vmlinuz-2.6.32-71.el6.x86_64 ro root=/dev/mapper/GLSvg-GLSrootrd_LVM_LV=GLSvg/GLSroot rd_LVM_LV=GLSvg/GLSswaprd_NO_LUKSrd_NO_MDrd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet kmcrl=5 Restart to take effect and verification:
# cat /proc/cmdline
ro root=/dev/mapper/GLSvg-GLSroot rd_LVM_LV=GLSvg/GLSroot rd_LVM_LV=GLSvg/GLSswap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rhgb quiet kmcrl=5
NEW QUESTION # 54
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