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How to extract/unpack/uncompress the contents of the initramfs boot image on CentOS 7,8 ?


by Danila Vershinin, August 7, 2021

How to fix how to extract/unpack/uncompress the contents of the initramfs image on centos 7 and rocky linux 8?

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How to list the number of packages in a repository using dnf repolist


by Danila Vershinin, August 6, 2021

How to fix in centos 7, `yum repolist` displays the number of packages in a repository.- on some rocky linux 8 instances, `yum repolist` or `dnf repolist` does not display the number of packages in a repository.

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Rocky Linux 8: NFSv4 + fscache always writes to cache but never reads back from the cache


by Danila Vershinin, August 5, 2021

How to fix an nfsv4 mount with fscache enabled never reads back from the cache

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[FIPS] ssh to RHEL6 server fails with message “ssh_dispatch_run_fatal: Connection to XXX port 22: invalid argument”


by Danila Vershinin, August 4, 2021

How to fix on a rocky linux 8 system with fips enabled, connecting to a rhel6 system fails, `ssh-v` displays the following message ~~~ […] debug1: ssh2_msg_kex_dh_gex_request(2048 <8192 <8192) sent debug1: got ssh2_msg_kex_dh_gex_group ssh_dispatch_run_fatal: connection to xxx port 22: invalid argument ~~~

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How can we handle OSPF or other routing protocols in Rocky Linux 8?


by Danila Vershinin, August 3, 2021

How to fix was quagga removed from rocky linux 8 repos? how can we implement ospf in rocky linux 8?

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How to create Rocky Linux 8 image which supports UEFI and legacy bios mode both.


by Danila Vershinin, August 2, 2021

How to fix how to create an rocky linux 8 image which supports both uefi and legacy bios mode.- i created an rocky linux 8 image in legacy bios mode hypervisor and i want it to be used in uefi mode hypervisor without modification.

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How do I limit the usage of podman on Rocky Linux 8 to specific users / groups?


by Danila Vershinin, July 26, 2021

How to limit the users/groups who are able to use podman.

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Choosing your RHEL 8 clone after the death of CentOS


by Danila Vershinin, July 24, 2021

As CentOS is no longer an RHEL clone, companies seek another free clone of RHEL. What will it be? AlmaLinux, Rocky Linux, or Oracle Linux? We review these choices and give a recommendation.

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NGINX: putting multiple services on the same port


by Danila Vershinin, June 21, 2021

Recent versions of NGINX introduce the TLS pre-read capabilities, which allow it to see which TLS protocols are supported by the client, the requested SNI server name, and the ALPN protocol of request. All this information, known before the request is routed by NGINX to the upstream servers, makes it possible to conditionally route requests […]

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CentOS/RHEL: where is my PATH?


by Danila Vershinin, May 31, 2021

How to consistently set user’s PATH environment variable on CentOS/RHEL servers, while avoiding PATH duplication

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