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| Section | Objectives |
|---|---|
| Deploy, configure, and maintain systems | - Default boot target configuration - Time service clients - Bootloader configuration - Task scheduling with at, cron, and systemd timers - Software installation and updates - Service management |
| Manage software | - Install and remove Flatpak packages - Configure RPM repositories - Install and remove RPM packages - Configure Flatpak repositories |
| Operate running systems | - Secure file transfer - Process scheduling - Interrupt the boot process - Tuning profiles - Boot, reboot, and shut down systems - System logs and journals - Network services - Boot systems into different targets - Process monitoring and termination |
| Manage users and groups | - Local group management - Local user account management - Password and password aging management - Privileged access configuration |
| Understand and use essential tools | - File permissions - Text analysis with grep and regular expressions - Shell access and command syntax - Users and multi-user targets - File and directory management - File archiving and compression - Creating and editing text files - System documentation - Hard and soft links - Input and output redirection - Remote system access using SSH |
| Create simple shell scripts | - Looping constructs - Conditional execution - Processing script inputs - Processing command output |
| Create and configure file systems | - File permission troubleshooting - NFS file systems - VFAT, ext4, and XFS file systems - Autofs - Extending logical volumes |
| Manage basic networking | - Network services at boot - Hostname resolution - IPv4 and IPv6 configuration - Firewall configuration with firewalld and firewall-cmd |
| Configure local storage | - File system mounting using UUID or labels - GPT disk partitions - Physical volumes - Logical volumes - Adding partitions, logical volumes, and swap - Volume groups |
| Manage security | - SSH key-based authentication - SELinux Boolean settings - SELinux enforcing and permissive modes - SELinux file and process contexts - Firewall configuration - SELinux port labels - Default file permissions - SELinux file context restoration |
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問題 #57
Configure your Host Name, IP Address, Gateway and DNS.
Host name: station.domain40.example.com
/etc/sysconfig/network
hostname=abc.com
hostname abc.com
IP Address:172.24.40.40/24
Gateway172.24.40.1
DNS:172.24.40.1
答案：
解題說明：
Answer see in the explanation.
Explanation/Reference:
# cd /etc/syscofig/network-scripts/
# ls
# vim ifcfg-eth0 (Configure IP Address, Gateway and DNS) IPADDR=172.24.40.40 GATEWAY=172.24.40.1
DNS1=172.24.40.1
# vim /etc/sysconfig/network
(Configure Host Name)
HOSTNAME= station.domain40.example.com
OR
Graphical Interfaces:
System->Preference->Network Connections (Configure IP Address, Gateway and DNS) Vim /etc/ sysconfig/network
(Configure Host Name)
問題 #58
Configure the NTP service in your system.
答案：
解題說明：
see explanation below.
Explanation
system-config-date &
問題 #59
Configure Cron Job
Configure a cron job to automatically execute /usr/bin/echo hello every day at 14:23 for the user harry.
答案：
解題說明：
[root@node1 ~]# systemctl status crond
[root@node1 ~]# systemctl enable crond
[root@node1 ~]# crontab -e -u harry
23 14 * * * /usr/bin/echo hello
# Verification
[root@node1 ~]# crontab -l -u harry
問題 #60
A YUM source has been provided in the
http://instructor.example.com/pub/rhel6/dvd
Configure your system and can be used normally.
答案：
解題說明：
/etc/yum.repos.d/base.repo
[base]
name=base
baseurl=http://instructor.example.com/pub/rhel6/dvd
gpgcheck=0
yum list
問題 #61
Locate all the files owned by ira and copy them to the / root/findresults directory.
答案：
解題說明：
see explanation below.
Explanation
# find / -user ira > /root/findresults (if /root/findfiles is a file)
# mkdir -p /root/findresults
# find / -user ira -exec cp -a {} /root/findresults\; [ if /root/findfiles is a directory] ls /root/findresults
問題 #62
......
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