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Oracle Linux 8 Advanced System Administration Sample Questions (Q13-Q18):

NEW QUESTION # 13
Which two components are used for creating a new rsyslog rule?

A. parser
B. security policy
C. filter
D. module
E. action

Answer: C,E

Explanation:
* Option A (Correct):In rsyslog, afilteris used to determine which messages should be selected for further processing. Filters can be based on different criteria such as facility, severity, or specific message content.
* Option B (Correct):Anactionin rsyslog defines what to do with messages that match a filter. Actions can include writing to a log file, sending to a remote server, running a script, etc.
* Option C (Incorrect):A parser is not typically a component for creating a new rsyslog rule; it is involved in interpreting message formats.
* Option D (Incorrect):A module in rsyslog is a loadable component that provides additional capabilities, such as support for different protocols or output formats. It is not a direct component of a logging rule.
* Option E (Incorrect):Security policy is unrelated to the basic components used for defining rsyslog rules.
Oracle Linux Reference:Refer to:
* OracleLinux 8: Configuring Rsyslog

NEW QUESTION # 14
Examine these requirements for a host with a user oracle:
* Network services must run in a confined domain.
* The oracle user must be confined.
* The oracle user must be able to use Mozilla Firefox.
* Access to files and directories must be granted based only on SELinux contexts.
* The SELinux configuration must be persistent across system restarts.
* Users must be able to publish private HTML content.
Now examine these commands and output:
# sestatus
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: permissive
Mode from config file: permissive
Policy MLS status: enabled
Policy deny_unknown status: allowed
Memory protection checking: actual (secure)
Max Kernel policy version: 31
# setenforce enforcing
# semanage login -a -s guest_u oracle
# setsebool -P http_enable_homedirs on
Which requirements are satisfied?

A. 1, 2, 3, 6
B. 1, 2, 4, 5, 6
C. 1, 2, 6
D. 1, 2, 3, 4, 5, 6
E. 1, 2, 3, 5, 6
F. 1, 2, 4, 6

Answer: B

Explanation:
Explanation of Answer A:
* Network services running in a confined domain: SELinux provides domain confinement for services, ensuring they run with restricted access based on their defined policies.
* The oracle user must be confined: The commandsemanage login -a -s guest_u oracleconfines theoracleuser to theguest_uSELinux user role, which is a confined role.
* Access to files and directories based only on SELinux contexts: With SELinux enabled and the policy loaded, access is governed by SELinux contexts.
* Persistent SELinux configuration across reboots: Thesetenforce enforcingcommand, combined with the appropriate policy configuration, ensures that SELinux remains in enforcing mode across reboots.
* Users able to publish private HTML content: Thesetsebool -P http_enable_homedirs oncommand enables the use of user home directories for web content, allowing users to host personal web pages.

NEW QUESTION # 15
Examine these commands and output:
# cat /etc/auto.master
/net -hosts
/- auto.direct ro
# cat /etc/auto.direct
/nfs1 host01:/export/share1
/nfs2 -sync host01:/export/share2
/nfs3 host02:/export/share3
Automounter must be used to mount these filesystems. Which mount options will it use?

A. /nfs1 and /nfs3 are mounted read-only, async while /nfs2 is mounted read-write, sync.
B. /nfs1 and /nfs3 are mounted read-only, async while /nfs2 is mounted read-only, sync.
C. All three filesystems are mounted read-only, async.
D. All three filesystems are mounted read-only, sync.
E. All three filesystems are mounted read-write, sync.

Answer: B

Explanation:
Understanding the Automounter Configuration:
/etc/auto.master:
/net -hosts
/- auto.direct ro
* The /- auto.direct ro line indicates:
* Mount Point Prefix:/ (direct mounts)
* Map File:auto.direct
* Global Mount Options:ro (read-only)
/etc/auto.direct:
/nfs1 host01:/export/share1
/nfs2 -sync host01:/export/share2
/nfs3 host02:/export/share3
* /nfs1 and /nfs3:
* No specific mount options in auto.direct.
* Inherit the ro option from /etc/auto.master.
* /nfs2:
* Specifies -sync option in auto.direct.
* Inherits ro from /etc/auto.master.
* Mount options are ro,sync.
Mount Options Resolution:
* Global Options (ro) apply to all entries unless overridden.
* Per-Entry Options in auto.direct override or supplement global options.
Effective Mount Options:
* /nfs1:
* ro (from /etc/auto.master)
* Default NFS options (async unless sync is specified)
* /nfs2:
* ro (from /etc/auto.master)
* sync (specified in auto.direct)
* /nfs3:
* ro (from /etc/auto.master)
* Default NFS options (async)
Oracle Linux Reference:
* OracleLinux 8: Configuring File Systems-Automounter Configuration:
"Options specified in the master map apply to all entries in the map unless overridden by entries in the map itself."
* NFS Default Options:
"By default, NFS mounts are asynchronous (async) unless the sync option is specified." Conclusion:
* /nfs1 and /nfs3:Mounted with ro,async.
* /nfs2:Mounted with ro,sync.
* Correct Option:A

NEW QUESTION # 16
Which statement is true about slice units?

A. Processes in a slice unit are named at the same level as scopes and services.
B. A slice unit is a concept for hierarchically managing resources in a group of processes.
C. The system.slice contains all system services and user sessions.
D. A slice unit accepts multiple names by the creation of additional symlinks to the unit file.

Answer: B

NEW QUESTION # 17
Examine this command and output:
$ ftp host01.example.com
Connected to host01.example.com (192.168.40.131).
220 (vsFTPd 3.0.2)
Name (host01.example.com:oracle):
After entering a carriage return, this error message is displayed:
530 Permission denied
Login Failed
ftp>
Why is the oracle user denied access to the FTP server on host01.example.com?

A. The oracle user is listed in /etc/vsftpd/user_list and USERLIST_ENABLE is set to NO in /etc/vsftpd/vsftpd.conf.
B. LOCAL_ENABLE is set to NO in /etc/vsftpd/vsftpd.conf.
C. The oracle user is listed in /etc/vsftpd/ftpusers.
D. The oracle user is listed in /etc/vsftpd/user_list and USERLIST_ENABLE is set to YES in /etc/vsftpd/vsftpd.conf.
E. The oracle user does not exist on host01.example.com.

Answer: C

NEW QUESTION # 18
......

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