Information Collection

• Information Collection
  • Querying OS Information
  • Querying Hardware Information
  • Querying Software Information
  • Viewing OS Logs

Querying OS Information

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

   1. cat /etc/openEuler-latest
      Output:

      openeulerversion=openEuler-22.03-LTS-SP2
      compiletime=2022-12-27-22-15-04
      gccversion=10.3.1-20
      kernelversion=5.10.0-136.12.0.86.oe2203sp2
      openjdkversion=1.8.0.352.b08-3.oe2203sp2
      

   2. cat /etc/os-release
      Output:

      NAME="openEuler"
      VERSION="22.03 (LTS-SP2)"
      ID="openEuler"
      VERSION_ID="22.03"
      PRETTY_NAME="openEuler 22.03 (LTS-SP2)"
      ANSI_COLOR="0;31"
      

   3. cat /etc/openEuler-release
      Output:

      openEuler release 22.03 (LTS-SP2)
      

2. Query the kernel version.

   uname -a
   

   Output:

   Linux localhost 5.10.0-136.12.0.86.oe2203sp2.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.

   lscpu
   

   

2. View CPU parameters.

   cat /proc/cpuinfo
   

   

3. View system memory information.

   cat /proc/meminfo
   

   

4. View memory information.

   dmidecode -t memory
   

   

5. View hard drive and partition distribution.

   lsblk
   

   

6. View details about hard drives and partitions.

   fdisk -l
   

   

7. View NIC information.

   lspci | grep -i 'eth'
   

   

8. View all network interfaces.

   ip a or ifconfig -a
   

   

9. View details about a network interface.

   ethtool enp7s0 (enp7s0 is used as an example.)
   

   

10. View PCI information.

    lspci
    

    

11. View the device tree.

    lspci -t
    

    

12. View BIOS information.

    dmidecode -t bios
    

    

Querying Software Information

1. Query details about a software package.

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

   

2. View the modules provided by a software package.

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

   /bin/systemctl
   /sbin/shutdown
   config(systemd) = 249-43.oe2203sp2
   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.oe2203sp2
   systemd(x86-64) = 249-43.oe2203sp2
   systemd-rpm-config
   systemd-sysv = 206
   systemd-units = 249-43.oe2203sp2
   

3. View all installed software packages.

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

   systemd-help-249-43.oe2203sp2.noarch
   systemd-libs-249-43.oe2203sp2.x86_64
   systemd-249-43.oe2203sp2.x86_64
   systemd-udev-249-43.oe2203sp2.x86_64
   

4. View the list of software packages.

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

   

Viewing OS Logs

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

   cat  /var/log/messages
   

   

2. View the security-related logs.

   cat /var/log/secure
   

   

3. View the email-related logs.

   cat /var/log/maillog
   

   

4. View the logs related to scheduled tasks.

   cat /var/log/cron
   

   

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

   cat /var/log/spooler
   

   

6. View system startup logs.

   cat /var/log/boot.log