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| Section | Objectives |
|---|---|
| Topic 1: Manage security | - Configure key-based authentication for SSH - Manage SELinux port labels - List and identify SELinux file and process contexts - Manage default file permissions - Use Boolean settings to modify SELinux settings - Set enforcing and permissive modes for SELinux - Restore default file contexts - Configure firewall settings using firewall-cmd and firewalld |
| Topic 2: Configure local storage | - Assign physical volumes to volume groups - Create and remove physical volumes - Create and delete logical volumes - List, create, and delete partitions on GPT disks - Configure systems to mount file systems at boot by UUID or label - Add new partitions, logical volumes, and swap non-destructively |
| Topic 3: Create and configure file systems | - Create, mount, unmount, and use VFAT, ext4, and XFS file systems - Diagnose and correct file permission problems - Extend existing logical volumes - Mount and unmount network file systems using NFS - Configure autofs |
| Topic 4: Deploy, configure, and maintain systems | - Modify the system bootloader - Start and stop services and configure services to start automatically at boot - Configure time service clients - Configure systems to boot into a specific target automatically - Install and update software packages - Schedule tasks using at, cron, and systemd timer units |
| Topic 5: Manage software | - Configure access to Flatpak repositories - Configure access to RPM repositories - Install and remove RPM software packages - Install and remove Flatpak software packages |
| Topic 6: Create simple shell scripts | - Process output of shell commands within a script - Conditionally execute code - Process script inputs - Use looping constructs to process files and command-line input |
| Topic 7: Manage basic networking | - Configure network services to start automatically at boot - Configure hostname resolution - Restrict network access using firewalld and firewall-cmd - Configure IPv4 and IPv6 addresses |
| Topic 8: Manage users and groups | - Create, delete, and modify local groups and group memberships - Change passwords and adjust password aging for local users - Configure privileged access - Create, delete, and modify local user accounts |
| Topic 9: Understand and use essential tools | - Use input-output redirection - Create and edit text files - Locate, read, and use system documentation - Create hard and soft links - Log in and switch users in multi-user targets - Use grep and regular expressions to analyze text - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - List, set, and change standard ugo/rwx permissions - Access remote systems using SSH - Access a shell prompt and issue commands with correct syntax - Create, delete, copy, and move files and directories |
| Topic 10: Operate running systems | - Interrupt the boot process to gain access to a system - Boot, reboot, and shut down a system normally - Boot systems into different targets manually - Start, stop, and check the status of network services - Identify CPU and memory intensive processes and kill processes - Preserve system journals - Securely transfer files between systems - Locate and interpret system log files and journals - Manage tuning profiles - Adjust process scheduling |
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NEW QUESTION # 39
Which of the log messages below matches the following Logstash grok filter?
grok {
match => ["message", "%{SYSLOGBASE} new node %{IPORHOST:node}" ]
}
Answer: A
NEW QUESTION # 40
Install a FTP server, and request to anonymous download from /var/ftp/pub catalog. (it needs you to configure yum direct to the already existing file server. )
Answer:
Explanation:
Answer see in the explanation.
Explanation/Reference:
# cd /etc/yum.repos.d
# vim local.repo
[local]
name=local.repo
baseurl=file:///mnt
enabled=1
gpgcheck=0
# yum makecache
# yum install -y vsftpd
# service vsftpd restart
# chkconfig vsftpd on
# chkconfig --list vsftpd
# vim /etc/vsftpd/vsftpd.conf
anonymous_enable=YES
NEW QUESTION # 41
SIMULATION
1. Find all sizes of 10k file or directory under the /etc directory, and copy to /tmp/findfiles directory.
2. Find all the files or directories with Lucy as the owner, and copy to /tmp/findfiles directory.
Answer:
Explanation:
See explanation below.
Explanation/Reference:
Explanation:
(1)find /etc -size 10k -exec cp {} /tmp/findfiles \;
(2)find / -user lucy -exec cp -a {} /tmp/findfiles \;
Note: If find users and permissions, you need to use cp - a options, to keep file permissions and user attributes etc.
NEW QUESTION # 42
Create User Account.
Create the following user, group and group membership:
Adminuser group
User natasha, using adminuser as a sub group
User Harry, also using adminuser as a sub group
User sarah, can not access the SHELL which is interactive in the system, and is not a member of adminuser, natashaharrysarah password is redhat.
Answer:
Explanation:
see explanation below.
Explanation
groupadd adminuser
useradd natasha -G adminuser
useradd haryy -G adminuser
useradd sarah -s /sbin/nologin
Passwd user name // to modify password or echo redhat | passwd --stdin user name id natasha // to view user group.
NEW QUESTION # 43
You are a System administrator. Using Log files very easy to monitor the system. Now there are 50 servers running as Mail, Web, Proxy, DNS services etc. You want to centralize the logs from all servers into on LOG Server. How will you configure the LOG Server to accept logs from remote host?
Answer:
Explanation:
By default, system accept the logs only generated from local host. To accept the Log from other host configure:
vi /etc/sysconfig/syslog SYSLOGD_OPTIONS="-m 0 -r"
Where
-m 0 disables 'MARK' messages.
-r enables logging from remote machines
-x disables DNS lookups on messages received with -r
service syslog restart
NEW QUESTION # 44
......
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