Information Collection

Querying OS Information

1. Query the OS version.

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

2. Query the kernel version.

   # uname -a
   

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.)
   

3. View all installed software packages.

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

4. View the list of software packages.

   rpm -ql (python3-rpm is used as an emple.)
   

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 the logs related to the startup and stop of the daemon process.

   cat /var/log/boot.log