[LINUX] Trajectory when ssh connecting to guest OS on VirtualBox

Trajectory when ssh connecting to guest OS on VirtualBox

I wasted time when sshing from the host OS to the guest OS on VirtualBox. Summarize the trajectory.

The method of ssh connection is as follows

• ① Set "NAT" for adapter 1 in the network settings * Default settings are OK
• (2) Set "Host Only Adapter" for Adapter 2 in the network settings * Default settings are OK

With the above settings, you should be able to make an SSH connection between "Host OS → Guest OS" and "Guest OS ⇔ Guest OS".

However, I couldn't do it in my environment, probably because the initial construction method was bad.

So, I checked the following two ways.

• ① Is the OpenSSH server running?

systemctl status sshd

Since it was "active", there was no problem.

• ② Is the network enabled?

nmcli device

"Disconnected" ... why not! !! When I restarted, it seems that the connection was lost. So, modify the config file. Change "ONBOOT = no" in the file "/ etc / sysconfig / network-scripts / ifcfg-enpXX" to "ONBOOT = yes" and reboot.

• XX: It should be the one with the larger Ethernet number.

As a result of the above, a wonderful SSH connection is possible. I'm happy.

You can check the IP with ifconfig.

• It should be the one with the larger Ethernet number.

Reference URL ①: https://www.shookuro.com/entry/2018/02/10/172724 Reference URL ②: https://restypi.hatenablog.com/entry/2018/05/15/VirtualBox%E4%B8%8A%E3%81%AE_CentOS_%E3%81%AB_ssh_%E6%8E%A5%E7%B6 % 9A% E3% 81% 99% E3% 82% 8B_% 5B_Windows_% E7% B7% A8% 5D