Information Collection ​

Querying OS Information ​

1. Query the OS version by running either of the following commands.

   1. cat /etc/openEuler-latest
      Output:

      text

      openeulerversion=openEuler-22.03-LTS-SP4
      compiletime=2022-12-27-22-15-04
      gccversion=10.3.1-20
      kernelversion=5.10.0-136.12.0.86.oe2203SP3
      openjdkversion=1.8.0.352.b08-3.oe2203SP3

   2. cat /etc/os-release
      Output:

      text

      NAME="openEuler"
      VERSION="22.03 (LTS-SP4)"
      ID="openEuler"
      VERSION_ID="22.03"
      PRETTY_NAME="openEuler 22.03 (LTS-SP4)"
      ANSI_COLOR="0;31"

   3. cat /etc/openEuler-release
      Output:

      text

      openEuler release 22.03 (LTS-SP4)

2. Query the kernel version.

   shell

   uname -a

   Output:

   text

   Linux localhost 5.10.0-136.12.0.86.oe2203SP3.x86_64 #1 SMP Tue Dec 27 17:50:15 CST 2022 x86_64 x86_64 x86_64 GNU/Linux

Querying Hardware Information ​

1. Query CPU statistics.

   shell

   lscpu

   

2. View CPU parameters.

   shell

   cat /proc/cpuinfo

   

3. View system memory information.

   shell

   cat /proc/meminfo

   

4. View memory information.

   shell

   dmidecode -t memory

   

5. View hard drive and partition distribution.

   shell

   lsblk

   

6. View details about hard drives and partitions.

   shell

   fdisk -l

   

7. View NIC information.

   shell

   lspci | grep -i 'eth'

   

8. View all network interfaces.

   shell

   ip a or ifconfig -a

   

9. View details about a network interface.

   shell

   ethtool enp7s0 (enp7s0 is used as an example.)

   

10. View PCI information.

    shell

    lspci

    

11. View the device tree.

    shell

    lspci -t

    

12. View BIOS information.

    shell

    dmidecode -t bios

    

Querying Software Information ​

1. Query details about a software package.

   shell

   rpm -qi (systemd is used as an example.)

   

2. View the modules provided by a software package.

   shell

   rpm -q --provides # (systemd is used as an example.)

   text

   /bin/systemctl
   /sbin/shutdown
   config(systemd) = 249-43.oe2203SP3
   libsystemd-shared-249.so()(64bit)
   libsystemd-shared-249.so(SD_SHARED)(64bit)
   pkgconfig(systemd) = 249
   pkgconfig(udev) = 249
   syslog
   system-setup-keyboard = 0.9
   systemd = 249-43.oe2203SP3
   systemd(x86-64) = 249-43.oe2203SP3
   systemd-rpm-config
   systemd-sysv = 206
   systemd-units = 249-43.oe2203SP3

3. View all installed software packages.

   shell

   rpm -qa # (systemd is used as an example.)

   text

   systemd-help-249-43.oe2203SP3.noarch
   systemd-libs-249-43.oe2203SP3.x86_64
   systemd-249-43.oe2203SP3.x86_64
   systemd-udev-249-43.oe2203SP3.x86_64

4. View the list of software packages.

   shell

   rpm -ql # (python3-rpm is used as an example.)

   

Viewing OS Logs ​

1. View the information and error logs after the system is started.

   shell

   cat  /var/log/messages

   

2. View the security-related logs.

   shell

   cat /var/log/secure

   

3. View the email-related logs.

   shell

   cat /var/log/maillog

   

4. View the logs related to scheduled tasks.

   shell

   cat /var/log/cron

   

5. View the logs related to UUCP and news devices.

   shell

   cat /var/log/spooler

   

6. View system startup logs.

   shell

   cat /var/log/boot.log