Information Collection ​

Querying OS Information ​

1. Query the OS version.

   shell

   cat /etc/openEuler-latest
   cat /etc/os-release
   cat /etc/openEuler-release

2. Query the kernel version.

   shell

   uname -a

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
   yum install -y net-tools
   ifconfig

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 # (systemd is used as an example.)

2. View the modules provided by a software package.

   shell

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

3. View all installed software packages.

   shell

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

4. View the file list of a software package.

   shell

   rpm -ql python3-rpm # (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 the logs related to the startup and stop of the daemon process.

   shell

   cat /var/log/boot.log