How to find SSL Certificate fingerprint

SSL Certficate

To view the SSL certificate fingerprint, open the website in the google chrome browser. On the browser address bar, you will see the lock icon, click on it. Click on “Connection is secure” Click on “Certificate is Valid”. You will see SSL Certificate details as shown below. You will see SHA-256 and SHA-1 Fingerprint. To … Read more

CentOS 8 Error: Failed to download metadata for repo ‘appstream’

When updating packages on CentOS 8 server, I got the following error [root@instance-20220409-2340 ~]# dnf update Failed loading plugin “osmsplugin”: No module named ‘librepo’ CentOS Linux 8 – AppStream 51 B/s | 38 B 00:00 Error: Failed to download metadata for repo ‘appstream’: Cannot prepare internal mirrorlist: No URLs in mirrorlist [root@instance-20220409-2340 ~]# This is … Read more

Install Ant Media Server on CentOS 8

To install Ant Media Server on CentOS 8, first install wget yum install wget -y Download installer script wget https://raw.githubusercontent.com/ant-media/Scripts/master/install_ant-media-server.sh Next you need to download binary zip file of Ant Media Server. For this install i used trail version ant-media-server-enterprise-2.2.1-20201029_2042.zip For community version, you can download from https://github.com/ant-media/Ant-Media-Server/releases Download it to same directory as “install_ant-media-server.sh”. … Read more

Install Linux KVM on CentOS 8

To install Linux KVM hypervisor on CentOS 8, run Install libvirtd Enable libvirtd to start on boot Start libvirtd To see status, run Install virt-install Now you have Linux KVM installed. You can use virt-install or Virt Manager to create virtual machine. See Linux KVM Virtualization

Install PHP 7.3 in CentOS 8

CentOS 8 comes with PHP 7.2. To install PHP 7.3, you need to enable remi repo. You can download remi-release rpm file from http://rpms.remirepo.net Download and install remi-release rpm cd ; wget http://rpms.remirepo.net/enterprise/remi-release-8.rpm dnf install remi-release-8.rpm if you have older php version and don’t want to keep it, uninstall it with dnf remove php-gd php-xml … Read more

Creating CentOS 8 Virtual Machine with Vagrant

CentOS 8 vagrant

Create a directory for Vagrant project mkdir -p ~/vagrant/centos8 cd ~/vagrant/centos8 vagrant init generic/centos8 This will create a file with name “Vagrantfile” on current folder. To start the CentOS 8 VM, run vagrant up To SSH into CentOS 8 virtual machine vagrant ssh To stop a VM, run vagrant halt See Vagrant

CentOS 8 disable Activate the web console message

When login to CentOS 8 using SSH, you get a message asking you to enable web console. Activate the web console with: systemctl enable –now cockpit.socket You can uninstall cockpit with command yum remove cockpit* If you just need to disable the message, delete the file rm -f /etc/motd.d/cockpit This is actually a symlink to … Read more

Install CentOS 8 from Net boot ISO

CentOS 8 software selection

CentOS 8 provide 2 type of ISO. One that ends with boot.iso, this is 534 MB. This only include essential files to get you started with installation. This installation method require internet connection as files needed to be downloaded from internet. Other ISO file is full install media, that is 6.6 GB in size. To … Read more