CentOS MATE to CentOS Core

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Description:

Over the last few months I’ve been moving my CentOS MATE VM’s to CentOS core. Here is how I setup my template Core VM:

To Resolve:

  1. Used GUI installer to create the VM. Created root password and admin user.

  2. At first login:

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    yum update
    yum install net-tools
    
  3. First tasks after updates is to set a static IP:

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    vi /etc/sysconfig/network-scripts/enp0s3
    
    #set it like:
    
    TYPE="Ethernet"
    BOOTPROTO="none"
    DEFROUTE="yes"
    IPV4_FAILURE_FATAL="no"
    IPV6INIT="no"
    IPV6_AUTOCONF="yes"
    IPV6_DEFROUTE="yes"
    IPV6_PEERDNS="yes"
    IPV6_PEERROUTES="yes"
    IPV6_FAILURE_FATAL="no"
    IPV6_ADDR_GEN_MODE="stable-privacy"
    NAME="enp0s3"
    UUID="233f2b4b-877c-4b28-b17d-1eb091ded288"
    DEVICE="enp0s3"
    ONBOOT="yes"
    IPADDR="192.168.1.100"
    PREFIX="24"
    GATEWAY="192.168.1.1"
    DNS1="8.8.8.8"
    
  4. Next we configure SSH:

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    #check version
    ssh -v
    
    #edit the config file
    vi /etc/ssh/sshd_config
    
    #change the following:
    
    # Protocol 2,1
    Protocol 2
    
    # PermitRootLogin yes
    PermitRootLogin no
    
    #save, exit, restart the service so it will take effect
    systemctl restart sshd.service
    
  5. Setup firewall

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