Red Hat Enterprise Linux Diagnostics and Troubleshooting

Instructions

You collect hardware information from servera, and list hardware errors that rasdaemon reports. Use the /root/systeminfo.txt file on servera to record servera hardware information.

1. Login to servera and switch to the root user.

   [student@workstation ~]$ ssh student@servera
   ...output omitted...
   [student@servera ~]$ sudo -i
   [sudo] password for student: student
   [root@servera ~]#

2. Record servera hardware information.

   1. View which boot image was last used.

      [root@servera ~]# dmesg | grep BOOT_IMAGE
      [    0.000000] Command line: BOOT_IMAGE=(hd0,gpt3)/boot/vmlinuz-4.18.0-305.el8.x86_64 root=/dev/vda3 ro no_timer_check net.ifnames=0 crashkernel=auto
      [    0.000000] Kernel command line: BOOT_IMAGE=(hd0,gpt3)/boot/vmlinuz-4.18.0-305.el8.x86_64 root=/dev/vda3 ro no_timer_check net.ifnames=0 crashkernel=auto

   2. Record the boot image in the /root/systeminfo.txt file.

      # Boot Image
      (hd0,gpt3)/boot/vmlinuz-4.18.0-305.el8.x86_64

   3. View the CPU model name.

      [root@servera ~]# lscpu
      Architecture:        x86_64
      CPU op-mode(s):      32-bit, 64-bit
      Byte Order:          Little Endian
      CPU(s):              2
      On-line CPU(s) list: 0,1
      Thread(s) per core:  1
      Core(s) per socket:  1
      Socket(s):           2
      NUMA node(s):        1
      Vendor ID:           GenuineIntel
      BIOS Vendor ID:      Red Hat
      CPU family:          6
      Model:               85
      Model name:          Intel(R) Xeon(R) Gold 6248 CPU @ 2.50GHz
      BIOS Model name:     RHEL 7.6.0 PC (i440FX + PIIX, 1996)
      Stepping:            7
      CPU MHz:             2494.048
      ...output omitted...

   4. Record the CPU model name in the /root/systeminfo.txt file.

      # CPU Model
      Intel(R) Xeon(R) Gold 6248 CPU @ 2.50GHz

   5. View the size and form factor of the memory devices.

      [root@servera ~]# dmidecode -t memory
      # dmidecode 3.2
      Getting SMBIOS data from sysfs.
      SMBIOS 2.8 present.
      ...output omitted...
      Handle 0x1100, DMI type 17, 40 bytes
      Memory Device
      	Array Handle: 0x1000
      	Error Information Handle: Not Provided
      	Total Width: Unknown
      	Data Width: Unknown
      	Size: 2 GB
      	Form Factor: DIMM
      	Set: None
      	Locator: DIMM 0
      ...output omitted...

   6. Record the size and form factor of the memory devices in the /root/systeminfo.txt file.

      # Memory
      Size: 2 GB
      Form Factor: DIMM

   7. View the devices that are connected via any USB bus.

      [root@servera ~]# lsusb
      Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd
      Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

   8. Record the USB devices in the /root/systeminfo.txt file.

      # USB Devices
      Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
      Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd

   9. View the devices that are connected via the PCI bus.

      [root@servera ~]# lspci
      00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
      00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
      00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II]
      00:01.2 USB controller: Intel Corporation 82371SB PIIX3 USB [Natoma/Triton II]
      00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
      00:02.0 VGA compatible controller: Cirrus Logic GD 5446
      00:03.0 Ethernet controller: Red Hat, Inc. Virtio network device
      00:04.0 Ethernet controller: Red Hat, Inc. Virtio network device
      00:05.0 SCSI storage controller: Red Hat, Inc. Virtio block device
      00:06.0 SCSI storage controller: Red Hat, Inc. Virtio block device
      00:07.0 Unclassified device [00ff]: Red Hat, Inc. Virtio memory balloon

   10. Record the PCI devices in the /root/systeminfo.txt file.

       # PCI Devices
       00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
       00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
       00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II]
       00:01.2 USB controller: Intel Corporation 82371SB PIIX3 USB [Natoma/Triton II]
       00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
       00:02.0 VGA compatible controller: Cirrus Logic GD 5446
       00:03.0 Ethernet controller: Red Hat, Inc. Virtio network device
       00:04.0 Ethernet controller: Red Hat, Inc. Virtio network device
       00:05.0 SCSI storage controller: Red Hat, Inc. Virtio block device
       00:06.0 SCSI storage controller: Red Hat, Inc. Virtio block device
       00:07.0 Unclassified device [00ff]: Red Hat, Inc. Virtio memory balloon

3. Install rasdaemon, start and enable the service, and add a summary of all hardware errors to the /root/systeminfo.txt file.

   1. Install the rasdaemon package.

      [root@servera ~]# yum install rasdaemon
      ...output omitted...

   2. Start and enable the rasdaemon service.

      [root@servera ~]# systemctl enable --now rasdaemon
      Created symlink /etc/systemd/system/multi-user.target.wants/rasdaemon.service → /usr/lib/systemd/system/rasdaemon.service.

   3. View a summary of all hardware errors.

      [root@servera ~]# ras-mc-ctl --errors
      No Memory errors.
      
      No PCIe AER errors.
      
      No Extlog errors.
      
      No MCE errors.

   4. Record the error summary in the /root/systeminfo.txt file.

      # Hardware Errors
      No Memory errors.
      
      No PCIe AER errors.
      
      No Extlog errors.
      
      No MCE errors.

4. Return to workstation as the student user.

   [root@servera ~]# exit
   [student@servera ~]$ exit
   [student@workstation ~]$