Information Collection

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

Querying OS Information

1. Query the OS version.

   cat /etc/openEuler-latest
   

   [root@localhost ~]# cat /etc/openEuler-latest
   openeulerversion=openEuler-23.03
   compiletime=2023-03-27-12-05-38
   gccversion=10.3.1-26.oe2303
   kernelversion=6.1.19-7.0.0.17.oe2303
   openjdkversion=1.8.0.362.b09-2.oe2303
   [root@localhost ~]#
   

   cat /etc/os-release
   

   [root@localhost ~]# cat /etc/os-release
   NAME="openEuler"
   VERSION="23.03"
   ID="openEuler"
   VERSION_ID="23.03"
   PRETTY_NAME="openEuler 23.03"
   ANSI_COLOR="0;31"
   
   [root@localhost ~]#
   

   cat /etc/openEuler-release
   

   [root@localhost ~]# cat /etc/openEuler-release
   openEuler release 23.03
   [root@localhost ~]#
   

2. Query the kernel version.

uname -a

[root@localhost ~]# uname -a
Linux localhost.localdomain 6.1.19-7.0.0.17.oe2303.x86_64 #1 SMP PREEMPT_DYNAMIC Tue Mar 28 00:01:02 CST 2023 x86_64 x86_64 x86_64 GNU/Linux
[root@localhost ~]#

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