Which gnu/linux command lets you see the latest logged in users to your server ?
- sudo
- tcpdump
- last
- netstat
EXPLANATION
https://www.centoshowtos.org/commands/last/
https://www.centoshowtos.org/commands/last/
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&...
Configure Phase 2 of the IPsec VPN tunnel.
(For route-based VPNs) Bind the secure tunnel interface st0.x to the IPsec VPN tunnel.
SOURCE
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwijve__s_vXAhUs3IMKHfv7C1gQFggyMAI&url=http%3A%2F%2Fwww.ciscopress.com%2Farticles%2Farticle.asp%3Fp%3D24833%26seqNum%3D6&usg=AOvVaw0WF2U-qwYgHjTvkVu2BzSZ
Type 1 hypervisor running directly on the hardware with VM resources
provided by the hypervisor such as VMware ESXi and Citrix XenServer
Type 2 hypervisor runs on a host operating system to provide virtualization services such as VMware Workstation or Oracle VirtualBox running on Microsoft Windows, or Debian Linux.
For more information on Hypervisors
https://en.wikipedia.org/wiki/Hypervisor
Stratum 1 NTP servers are the highest, most trusted order of NTP servers. They receive their time by being directly connected to a reference clock, typically an atomic clock. Reference clocks are also referred to as stratum 0 devices.