Fixing Yum Update on Centos 8 Stream Error: Failed to download metadata for repo ‘AppStream’: Cannot prepare internal mirrorlist: No URLs in mirrorlist Rumi, July 24, 2023 I had installed a minimalist CentOS 8 on one of my servers. Installation went successful, however, when I tried to update the system using yum update I see this error message: Failed to download metadata for repo. Below is the complete error. [root@autocontroller ~]# yum update CentOS-8 – AppStream 70 B/s |… Continue Reading
29 organisations listed as ‘critical information infrastructure’ under DSA Rumi, July 18, 2023 The ICT Division on Monday declared 29 organisations as ‘critical information infrastructure’ under the Digital Security Act for the safety of sensitive data under which any illegal access to computers, digital devices or networks is a punishable offence. ‘Critical information infrastructure’ in the controversial Act means any external or virtual… Continue Reading
Adding NextCloud as a Windows Drive using Rclone Rumi, July 13, 2023 Pretty Straightforward- rclone config choose “n” for “New remote” choose name for Nextcloud –> rshare (or any name you want to keep as rclone config name) choose “Type of Storage” –> Webdav provide Nextcloud URL for webdav access –> https://<nextclouddomain>/remote.php/dav/uploads/<user>/ choose Vendor –> Nextcloud specify “user” –> (see `<user>` in… Continue Reading
Set up your site-to-site VPN with Access Server using OpenVPN Rumi, July 9, 2023 Allow access to private subnets Sign in to the Admin Web UI for your Access Server. Click Configuration > VPN Settings. Under Routing, and Should VPN clients have access to private subnets (non-public networks on the server side)?, click Yes, using Routing. Click Specify the private subnets to which all… Continue Reading
Setting up a PPPoE server on Linux CentOS 7 Rumi, July 8, 2023 Method-1 Build PPPoE, success, I think the TM super simple, in CentOS is about 5 steps can be done 1, install PPPoE, after the installation is complete, there will be pppoe-server command Yum Install Rp-pppoe 2, after the installation is completed, will be in the/ETC/PPP directory generated pppoe-server-options files, the… Continue Reading
VNC Client Access on Proxmox KVM guests Rumi, June 30, 2023 Configure VNC Access in the Configuration File Add a line to the VM’s configuration file /etc/pve/local/qemu-server/<VMID>.conf which specifies the VNC display number as follows (“77” in the example below): args: -vnc 0.0.0.0:77 If you want to use password protection, add: args: -vnc 0.0.0.0:77,password=on The display number can be freely chosen,… Continue Reading
Install Zabbix 5.x Monitoring Server on Ubuntu 20.04 Rumi, June 24, 2023 Zabbix is a free, open-source, and high-performance monitoring tool for servers, applications, and network devices. It uses agents to collect system metrics. It also monitors standard services such as SMTP or HTTP services and supports host monitoring via SNMP, TCP, and ICMP checks. It is designed for real-time monitoring of… Continue Reading
Getting started with Xen Virtualization On CentOS 7.x Rumi, June 24, 2023 Welcome to Getting started with Xen Virtualization On CentOS 7.x. Xen is an open-source bare-metal hypervisor which allows you to run different operating systems in parallel on a single host machine. This type of hypervisor is normally referred to as a hypervisortype 1 in Virtualization world. Meltdown and Spectre Mitigation on Xen 6.5 and… Continue Reading
Install Zabbix Agent on Ubuntu 20.04 Rumi, June 21, 2023 Zabbix agent is installed on the remote host (target) to monitor the hard drive, memory processor, etc. The agent collects data and sends back to Zabbix Server. Zabbix agents can use passive or active checks to pass information. In passive check, Zabbix server (poller) requests an agent for certain information, and the agent sends back a… Continue Reading
Virtualmin create a catch-all email account Rumi, June 21, 2023 This tutorial will cover how to setup a catch-all email account. Once finished, it will be the default destination for any email arriving at your domain, unless overridden by another email account or alias. It assumes you have logged into Virtualmin as the root user. You can make any email… Continue Reading