RH124 - ch11s11

On workstation, run lab log-review start to start the exercise. This script records the current time zone of the serverb system and ensures that the environment is setup correctly.

[student@workstation ~]$ lab log-review start

From workstation, open an SSH session to serverb as student.

[student@workstation ~]$ ssh student@serverb
...output omitted...
[student@serverb ~]$

Pretend that the serverb system has been relocated to Jamaica and you must update the time zone appropriately. Use sudo to elevate the student user privileges for the timedatectl command to update the time zone. Use student as the password if asked.

Use the timedatectl command to view available time zones and determine the appropriate time zone for Jamaica.
```
[student@serverb ~]$ timedatectl list-timezones | grep Jamaica
America/Jamaica
```

Use the timedatectl command to set the time zone of the serverb system to America/Jamaica.

[student@serverb ~]$ sudo timedatectl set-timezone America/Jamaica
[sudo] password for student: student

Use the timedatectl command to verify that the time zone is successfully set to America/Jamaica.

[student@serverb ~]$ timedatectl
               Local time: Tue 2019-02-19 11:12:46 EST
           Universal time: Tue 2019-02-19 16:12:46 UTC
                 RTC time: Tue 2019-02-19 16:12:45
                 Time zone: America/Jamaica (EST, -0500)
System clock synchronized: yes
              NTP service: active
          RTC in local TZ: no

Display the log events recorded in the previous 30 minutes on serverb.

Use the date command to determine the time frame to view the journal entries.

[student@serverb ~]$ date
Fri Feb 22 07:31:05 EST 2019
[student@serverb ~]$ date -d "-30 minutes"
Fri Feb 22 07:01:31 EST 2019

Use the journalctl command --since and --until options to display log events recorded in the previous 30 minutes on serverb. To quit journalctl, press q.

[student@serverb ~]$ journalctl --since 07:01:00 --until 07:31:00
...output omitted...
Feb 22 07:24:28 serverb.lab.example.com systemd[1138]: Reached target Timers.
Feb 22 07:24:28 serverb.lab.example.com systemd[1138]: Reached target Paths.
Feb 22 07:24:28 serverb.lab.example.com systemd[1138]: Starting D-Bus User Message Bus Socket.
Feb 22 07:24:28 serverb.lab.example.com systemd[1138]: Listening on D-Bus User Message Bus Socket.
Feb 22 07:24:28 serverb.lab.example.com systemd[1138]: Reached target Sockets.
Feb 22 07:24:28 serverb.lab.example.com systemd[1138]: Reached target Basic System.
Feb 22 07:24:28 serverb.lab.example.com systemd[1138]: Reached target Default.
Feb 22 07:24:28 serverb.lab.example.com systemd[1138]: Startup finished in 123ms.
Feb 22 07:24:28 serverb.lab.example.com systemd[1]: Started User Manager for UID 1000.
Feb 22 07:24:28 serverb.lab.example.com sshd[1134]: pam_unix(sshd:session): session opened for user student by (uid=0)
Feb 22 07:26:56 serverb.lab.example.com systemd[1138]: Starting Mark boot as successful...
Feb 22 07:26:56 serverb.lab.example.com systemd[1138]: Started Mark boot as successful.
lines 1-36/36 (END) q
[student@serverb ~]$

Create the /etc/rsyslog.d/auth-errors.conf file, configured to have the rsyslog service write messages related to authentication and security issues to the new /var/log/auth-errors file. Use the authpriv facility and the alert priority in the configuration file.
Create the /etc/rsyslog.d/auth-errors.conf file to specify the new /var/log/auth-errors file as the destination for messages related to authentication and security issues. You may use the sudo vim /etc/rsyslog.d/auth-errors.conf command to create the configuration file.
authpriv.alert /var/log/auth-errors
Restart the rsyslog service so that the changes in the configuration file take effect.
[student@serverb ~]$ sudo systemctl restart rsyslog
Use the logger command to write a new log message to the /var/log/auth-errors file. Apply the -p authpriv.alert option to generate a log message relevant to authentication and security issues.
[student@serverb ~]$ logger -p authpriv.alert "Logging test authpriv.alert"
Use the tail command to confirm that the /var/log/auth-errors file contains the log entry with the Logging test authpriv.alert message.
[student@serverb ~]$ sudo tail /var/log/auth-errors Feb 19 11:56:07 serverb student[6038]: Logging test authpriv.alert
Log out of serverb.
[student@serverb ~]$ exit logout Connection to serverb closed. [student@workstation ~]$

Evaluation

On workstation, run the lab log-review grade command to confirm success of this exercise.

[student@workstation ~]$ lab log-review grade

Finish

On workstation, run lab log-review finish to complete this lab. This script ensures that the original time zone is restored along with all the original time settings on serverb.

[student@workstation ~]$ lab log-review finish

This concludes the guided exercise.

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Red Hat System Administration I (RH124)

Haley_Ruccio

19 lip 2023

The first of two courses covering the core system administration tasks needed to manage Red Hat Enterprise Linux serversRed Hat System Administration I (RH124) is designed for IT professionals without previous Linux system administration experience. The course provides students with Linux administration competence by focusing on core administration tasks. This course also provides a foundation for students who plan to become full-time Linux system administrators by introducing key command-line concepts and enterprise-level tools. This course is the first of a two-course series that takes a computer professional without Linux system administration knowledge to become a fully capable Linux administrator. These concepts are further developed in the follow-on course, Red Hat System Administration II (RH134).This course is based on Red Hat® Enterprise Linux 9.0.Course content summaryIntroduce Linux and the Red Hat Enterprise Linux ecosystem.Run commands and view shell environments.Manage, organize, and secure files.Manage users, groups and user security policies.Control and monitor systemd services.Configure remote access using the web console and SSH.Configure network interfaces and settings.Manage software using DNFAudience for this courseThe primary persona is a technical professional with current or pending responsibilities as a Linux enterprise or cloud system administrator.This course is popular in Red Hat Academy, and is targeted at the student who is planning to become a technical professional using Linux.Prerequisites for this courseBasic technical user skills with computer applications on some operating systems are expected.Take our free assessment to gauge whether this offering is the best fit for your skills.Technology considerationsThere are no special technical requirements for this course.This course is not designed for bring your own device (BYOD).Internet access is not required but is recommended so that students can research and browse Red Hat online resources.

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