1. 1. check up using kernel :
    3. [root@test ~]# uname -a
    4. Linux test 4.18.0-147.8.1.el8_1.x86_64 #1 SMP Thu Apr 9 13:49:54 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
    7. 2. check up kernel:
    9. [root@test ~]# rpm -qa | grep kernel
    10. kernel-modules-4.18.0-147.el8.x86_64
    11. kernel-devel-4.18.0-147.8.1.el8_1.x86_64
    12. kernel-devel-4.18.0-147.el8.x86_64
    13. kernel-modules-4.18.0-147.8.1.el8_1.x86_64
    14. kernel-headers-4.18.0-147.8.1.el8_1.x86_64
    15. kernel-tools-4.18.0-147.8.1.el8_1.x86_64
    16. kernel-tools-libs-4.18.0-147.8.1.el8_1.x86_64
    17. kernel-4.18.0-147.el8.x86_64
    18. kernel-core-4.18.0-147.el8.x86_64
    19. kernel-4.18.0-147.8.1.el8_1.x86_64
    20. kernel-core-4.18.0-147.8.1.el8_1.x86_64
    23. 3. remove kernel:
    24. [root@test ~]# dnf remove kernel-core-4.18.0-147.el8.x86_64
    27. 4. reboot :
    28. [root@test ~]# reboot