{"id":12979,"date":"2019-11-12T11:31:00","date_gmt":"2019-11-12T10:31:00","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/install-centos-8-on-virtualbox\/"},"modified":"2023-07-17T11:24:35","modified_gmt":"2023-07-17T09:24:35","slug":"install-centos-8-on-virtualbox","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/install-centos-8-on-virtualbox\/","title":{"rendered":"Install CentOS 8 on VirtualBox"},"content":{"rendered":"<p>Last days, I needed to test our <a href=\"https:\/\/www.dbi-services.com\/offering\/products\/dmk-management-kit\/\" target=\"_blank\" rel=\"noopener noreferrer\">DMK<\/a> tool for the new MySQL and MariaDB releases on the most recent version of <a href=\"https:\/\/www.centos.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">CentOS<\/a>.<br \/>\nHere you can find all important steps to configure a CentOS 8 VM with an Internet connection, a specific hostname and a static IP address, accessible through SSH on VirtualBox.<br \/>\n<!--more--><\/p>\n<h2>VM preparation<\/h2>\n<p>First of all, I create a new VM with the following configuration:<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35562\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Conf1-1.png\" alt=\"\" width=\"300\" height=\"246\" \/><br \/>\nI need to download CentOS 8 ISO image available on the net and configure it as media to boot my system:<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35564\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/1-1-1.png\" alt=\"\" width=\"300\" height=\"246\" \/><br \/>\nThen I configure my network cards:<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35565\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Conf3-1.png\" alt=\"\" width=\"300\" height=\"246\" \/><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35566\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Conf4-1.png\" alt=\"\" width=\"300\" height=\"247\" \/><br \/>\nMy adapter #9 is defined as follows:<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35567\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Conf5-1.png\" alt=\"\" width=\"300\" height=\"180\" \/><\/p>\n<h2>CentOS 8 installation<\/h2>\n<p>I can now start my VM and install CentOS 8 as below:<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35570\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/2-1-1.png\" alt=\"\" width=\"300\" height=\"251\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35571\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/3-1-1.png\" alt=\"\" width=\"300\" height=\"241\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35572\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/4.png\" alt=\"\" width=\"300\" height=\"256\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35573\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/5-2.png\" alt=\"\" width=\"300\" height=\"250\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35574\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/6-4.png\" alt=\"\" width=\"300\" height=\"246\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35581\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/6_2.png\" alt=\"\" width=\"300\" height=\"216\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35575\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/7-4.png\" alt=\"\" width=\"300\" height=\"249\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35576\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/8-4.png\" alt=\"\" width=\"300\" height=\"246\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35577\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/9-2.png\" alt=\"\" width=\"300\" height=\"242\" \/><!--more--><\/p>\n<p>Then I can reboot my VM (I need to remove the ISO image from the storage before).<\/p>\n<h2>Network configuration<\/h2>\n<p>It&#8217;s time to configure network. I used nmcli command line tool to do it (it&#8217;s automatically installed with CentOS 8 packages).<\/p>\n<h3>Hostname definition<\/h3>\n<p>I changed the hostname from localhost.localdomain to dbi-dmk:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\"># hostnamectl set-hostname dbi-dmk\n<\/pre>\n<p>And I check if it worked properly:<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [2]\"># hostnamectl\n   Static hostname: dbi-dmk\n         Icon name: computer-vm\n           Chassis: vm\n        Machine ID: 4e8ad322e97d43e29faa45bc2307ce00\n           Boot ID: bc835bf86eba4e1ab45950688f0acd26\n    Virtualization: oracle\n  Operating System: CentOS Linux 8 (Core)\n       CPE OS Name: cpe:\/o:centos:centos:8\n            Kernel: Linux 4.18.0-80.el8.x86_64\n      Architecture: x86-64\n<\/pre>\n<h3>Static IP address definition<\/h3>\n<p>Now I want to configure a static IP address on enp0s8 Ethernet card as below:<br \/>\n&#8211; IP ADDRESS: 192.168.25.31<br \/>\n&#8211; NETMASK: 255.255.255.0<br \/>\n&#8211; GATEWAY: 192.168.25.1<br \/>\nSo, I set the address to 192.168.25.31 and I configure the gateway:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\"># nmcli con mod enp0s8 ipv4.addresses 192.168.25.31\/24\n# nmcli con mod enp0s8 ipv4.gateway 192.168.25.1\n<\/pre>\n<p>I set the manual configuration to change from dhcp to static IP addressing:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\"># nmcli con mod enp0s8 ipv4.method manual\n<\/pre>\n<p>I set the ONBOOT option to yes:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\"># nmcli con mod enp0s8 connection.autoconnect yes\n<\/pre>\n<p>Then I save all modifications and reload enp0s8 interface:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\"># nmcli con up enp0s8\n<\/pre>\n<p>At this point, all changes are automatically saved into the file \/etc\/sysconfig\/network-scripts\/ifcfg-enp0s8:<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [5,13,16,17,19]\"># cat \/etc\/sysconfig\/network-scripts\/ifcfg-enp0s8\nTYPE=Ethernet\nPROXY_METHOD=none\nBROWSER_ONLY=no\nBOOTPROTO=none\nDEFROUTE=yes\nIPV4_FAILURE_FATAL=no\nIPV6INIT=yes\nIPV6_AUTOCONF=yes\nIPV6_DEFROUTE=yes\nIPV6_FAILURE_FATAL=no\nIPV6_ADDR_GEN_MODE=stable-privacy\nNAME=enp0s8\nUUID=00b9f5af-00a9-4fb3-8964-3d28179c1ed0\nDEVICE=enp0s8\nONBOOT=yes\nIPADDR=192.168.25.31\nPREFIX=24\nGATEWAY=192.168.25.1\n<\/pre>\n<h3>Internet access<\/h3>\n<p>I want also to have an Internet connection, so I need to activate enp0s3 interface:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\"># nmcli con mod enp0s3 connection.autoconnect yes\n# nmcli con mod enp0s3 proxy.browser-only yes\n# nmcli con up enp0s3\n<\/pre>\n<p>Same thing as before: all changes are automatically saved to file \/etc\/sysconfig\/network-scripts\/ifcfg-enp0s3:<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [13,16]\"># cat \/etc\/sysconfig\/network-scripts\/ifcfg-enp0s3\nTYPE=Ethernet\nPROXY_METHOD=none\nBROWSER_ONLY=yes\nBOOTPROTO=dhcp\nDEFROUTE=yes\nIPV4_FAILURE_FATAL=no\nIPV6INIT=yes\nIPV6_AUTOCONF=yes\nIPV6_DEFROUTE=yes\nIPV6_FAILURE_FATAL=no\nIPV6_ADDR_GEN_MODE=stable-privacy\nNAME=enp0s3\nUUID=97f723a8-6b8e-4703-843b-c35e978f324e\nDEVICE=enp0s3\nONBOOT=yes\n<\/pre>\n<p>I can now check that both interfaces are activated:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\"># nmcli connection\nNAME    UUID                                  TYPE      DEVICE\nenp0s3  97f723a8-6b8e-4703-843b-c35e978f324e  ethernet  enp0s3\nenp0s8  00b9f5af-00a9-4fb3-8964-3d28179c1ed0  ethernet  enp0s8\n# ip a |grep enp0s\n2: enp0s3:  mtu 1500 qdisc fq_codel state UP group default qlen 1000\n    inet 10.0.2.15\/24 brd 10.0.2.255 scope global dynamic noprefixroute enp0s3\n3: enp0s8:  mtu 1500 qdisc fq_codel state UP group default qlen 1000\n    inet 192.168.25.31\/24 brd 192.168.25.255 scope global noprefixroute enp0s8\n<\/pre>\n<p>And I edit the \/etc\/sysconfig\/network file to enable networking because a CentOS minimal installation can&#8217;t connect to the Internet by default:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\"># vi \/etc\/sysconfig\/network\nNETWORKING=yes\n# nmcli con up enp0s3\nConnection successfully activated (D-Bus active path: \/org\/freedesktop\/NetworkManager\/ActiveConnection\/6)\n# nmcli con up enp0s8\nConnection successfully activated (D-Bus active path: \/org\/freedesktop\/NetworkManager\/ActiveConnection\/7)\n# ping www.google.com\nPING www.google.com (216.58.215.228) 56(84) bytes of data.\n64 bytes from zrh11s02-in-f4.1e100.net (216.58.215.228): icmp_seq=1 ttl=54 time=104 ms\n64 bytes from zrh11s02-in-f4.1e100.net (216.58.215.228): icmp_seq=2 ttl=54 time=113 ms\n<\/pre>\n<h3>Remote access using SSH<\/h3>\n<p>Last step: I want to remotely access my VM through SSH.<br \/>\nSo I need to check the firewall configuration:<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [5,7]\"># firewall-cmd --list-all\npublic (active)\n  target: default\n  icmp-block-inversion: no\n  interfaces: enp0s3 enp0s8\n  sources:\n  services: cockpit dhcpv6-client ssh\n  ports:\n  protocols:\n  masquerade: no\n  forward-ports:\n  source-ports:\n  icmp-blocks:\n  rich rules:\n<\/pre>\n<p>and check if the sshd service is activated:<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [4]\"># systemctl status sshd\n\u25cf sshd.service - OpenSSH server daemon\n   Loaded: loaded (\/usr\/lib\/systemd\/system\/sshd.service; enabled; vendor preset: enabled)\n   Active: active (running) since Tue 2019-11-12 04:04:41 EST; 1h 16min ago\n     Docs: man:sshd(8)\n           man:sshd_config(5)\n Main PID: 797 (sshd)\n    Tasks: 1 (limit: 17968)\n   Memory: 7.5M\n   CGroup: \/system.slice\/sshd.service\n           \u2514\u2500797 \/usr\/sbin\/sshd -D -oCiphers=aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes256-cbc,aes128-gcm@openssh.com,aes128-ct&gt;\nNov 12 04:04:41 dbi-dmk systemd[1]: Starting OpenSSH server daemon...\nNov 12 04:04:41 dbi-dmk sshd[797]: Server listening on 0.0.0.0 port 22.\nNov 12 04:04:41 dbi-dmk systemd[1]: Started OpenSSH server daemon.\nNov 12 04:04:41 dbi-dmk sshd[797]: Server listening on :: port 22.\nNov 12 04:07:08 dbi-dmk sshd[1554]: Accepted password for root from 192.168.25.1 port 53480 ssh2\nNov 12 04:07:08 dbi-dmk sshd[1554]: pam_unix(sshd:session): session opened for user root by (uid=0)\nNov 12 04:07:08 dbi-dmk sshd[1558]: Accepted password for root from 192.168.25.1 port 53481 ssh2\nNov 12 04:07:08 dbi-dmk sshd[1558]: pam_unix(sshd:session): session opened for user root by (uid=0)\n<\/pre>\n<p>Everything seems ok, I can now access my VM using:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\"># ssh root@192.168.25.31\n<\/pre>\n<p>Enjoy CentOS 8 \ud83d\ude09<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Last days, I needed to test our DMK tool for the new MySQL and MariaDB releases on the most recent version of CentOS. Here you can find all important steps to configure a CentOS 8 VM with an Internet connection, a specific hostname and a static IP address, accessible through SSH on VirtualBox.<\/p>\n","protected":false},"author":42,"featured_media":12993,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[42],"tags":[72,73],"type_dbi":[],"class_list":["post-12979","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-operating-systems","tag-centos","tag-linux"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Install CentOS 8 on VirtualBox - dbi Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbi-services.com\/blog\/install-centos-8-on-virtualbox\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Install CentOS 8 on VirtualBox\" \/>\n<meta property=\"og:description\" content=\"Last days, I needed to test our DMK tool for the new MySQL and MariaDB releases on the most recent version of CentOS. 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