Red Hat System Administration II

Instructions

1. Log in to the serverb machine as the student user.

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

   Hide Solution

2. Pretend that the serverb machine is relocated to Jamaica and that you must update the time zone to America/Jamaica. Verify that you correctly set the appropriate time zone.

   1. Select the appropriate time zone for Jamaica.

      [student@serverb ~]$ tzselect
      Please identify a location so that time zone rules can be set correctly.
      Please select a continent, ocean, "coord", or "TZ".
       1) Africa
       2) Americas
       3) Antarctica
       4) Asia
       5) Atlantic Ocean
       6) Australia
       7) Europe
       8) Indian Ocean
       9) Pacific Ocean
      10) coord - I want to use geographical coordinates.
      11) TZ - I want to specify the timezone using the Posix TZ format.
      #? 2
      Please select a country whose clocks agree with yours.
       1) Anguilla            19) Dominican Republic  37) Peru
       2) Antigua & Barbuda   20) Ecuador             38) Puerto Rico
       3) Argentina           21) El Salvador         39) St Barthelemy
       4) Aruba               22) French Guiana       40) St Kitts & Nevis
       5) Bahamas             23) Greenland           41) St Lucia
       6) Barbados            24) Grenada             42) St Maarten (Dutch)
       7) Belize              25) Guadeloupe          43) St Martin (French)
       8) Bolivia             26) Guatemala           44) St Pierre & Miquelon
       9) Brazil              27) Guyana              45) St Vincent
      10) Canada              28) Haiti               46) Suriname
      11) Caribbean NL        29) Honduras            47) Trinidad & Tobago
      12) Cayman Islands      30) Jamaica             48) Turks & Caicos Is
      13) Chile               31) Martinique          49) United States
      14) Colombia            32) Mexico              50) Uruguay
      15) Costa Rica          33) Montserrat          51) Venezuela
      16) Cuba                34) Nicaragua           52) Virgin Islands (UK)
      17) Curaçao             35) Panama              53) Virgin Islands (US)
      18) Dominica            36) Paraguay
      #? 30
      
      The following information has been given:
      
      	Jamaica
      
      Therefore TZ='America/Jamaica' will be used.
      Selected time is now:	Wed Mar 16 07:17:15 EST 2022.
      Universal Time is now:	Wed Mar 16 12:17:15 UTC 2022.
      Is the above information OK?
      1) Yes
      2) No
      #? 1
      
      You can make this change permanent for yourself by appending the line
      	TZ='America/Jamaica'; export TZ
      to the file '.profile' in your home directory; then log out and log in again.
      
      Here is that TZ value again, this time on standard output so that you
      can use the /usr/bin/tzselect command in shell scripts:
      America/Jamaica

   2. Elevate the student user privileges to update the time zone of the serverb server to America/Jamaica.

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

   3. Verify that you successfully set the time zone to America/Jamaica.

      [student@serverb ~]$ timedatectl
                     Local time: Wed 2022-03-16 07:18:40 EST
                 Universal time: Wed 2022-03-16 12:18:40 UTC
                       RTC time: Wed 2022-03-16 12:18:40
                      Time zone: America/Jamaica (EST, -0500)
      System clock synchronized: yes
                    NTP service: active
                RTC in local TZ: no

   Hide Solution

3. View the recorded log events in the previous 30 minutes on the serverb machine.

   1. Determine the time frame to view the journal entries.

      [student@serverb ~]$ date
      Wed Mar 16 07:19:29 AM EST 2022
      [student@serverb ~]$ date -d "-30 minutes"
      Wed Mar 16 06:49:38 AM EST 2022

   2. View the recorded log events in the previous 30 minutes on the serverb machine.

      [student@serverb ~]$ journalctl --since 06:49:00 --until 07:19:00
      ...output omitted...
      Mar 16 07:10:58 localhost kernel: x86/PAT: Configuration [0-7]: WB  WC  UC- UC  WB  WP  UC- WT
      Mar 16 07:10:58 localhost kernel: found SMP MP-table at [mem 0x000f5bd0-0x000f5bdf]
      Mar 16 07:10:58 localhost kernel: Using GB pages for direct mapping
      Mar 16 07:10:58 localhost kernel: RAMDISK: [mem 0x2e0d9000-0x33064fff]
      Mar 16 07:10:58 localhost kernel: ACPI: Early table checksum verification disabled
      Mar 16 07:10:58 localhost kernel: ACPI: RSDP 0x00000000000F5B90 000014 (v00 BOCHS )
      Mar 16 07:10:58 localhost kernel: ACPI: RSDT 0x000000007FFE12C4 00002C (v01 BOCHS  BXPCRSDT 00000001 BXPC 00000001)
      Mar 16 07:10:58 localhost kernel: ACPI: FACP 0x000000007FFE11D0 000074 (v01 BOCHS  BXPCFACP 00000001 BXPC 00000001)
      Mar 16 07:10:58 localhost kernel: ACPI: DSDT 0x000000007FFDFDC0 001410 (v01 BOCHS  BXPCDSDT 00000001 BXPC 00000001)
      lines 1-50/50 q
      [student@serverb ~]$

   Hide Solution

4. Create the /etc/rsyslog.d/auth-errors.conf file. Configure the rsyslog service to write the Logging test authpriv.alert message to the /var/log/auth-errors file. Use the authpriv facility and the alert priority.

   1. Create the /etc/rsyslog.d/auth-errors.conf file and specify the new /var/log/auth-errors file as the destination for authentication and security messages.

      authpriv.alert  /var/log/auth-errors

   2. Restart the rsyslog service to apply the configuration file changes.

      [student@serverb ~]$ sudo systemctl restart rsyslog

   3. Use the logger -p command to write the Logging test authpriv.alert message to the /var/log/auth-errors file. Use the authpriv facility and the alert priority.

      [student@serverb ~]$ logger -p authpriv.alert "Logging test authpriv.alert"

   4. Verify 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
      Mar 16 07:25:12 serverb student[1339]: Logging test authpriv.alert

   5. Return to the workstation system as the student user.

      [student@serverb ~]$ exit
      logout
      Connection to serverb closed.
      [student@workstation ~]$

   Hide Solution