⬅️ DevOps
- 🔗 this YT tutorial
- 🔗 kodekloudGBP 17.10GBP/m
Where to get pre-configured images for Virtual box: osboxes
Guest vs host?
- host is your host machine, your laptop
- guest is the VM (e.g. virtualbox)
What does Vagrant do (compared to Virtual Box)
- download
- create VM
- create networks (NAT, NAT-network, host-only, bridged)
- configure networking
- configure port forwarding (aka making your computers a server so that the VM box can for example access the internet through it)
- boot up VM
Vagrant is useful for more complex systems involving multiple VMs Browse existing Vagrant boxes on Vagrant cloud
DNS
- local solution: inside
/etc/hostsyou can give IP addresses specific names (aka name resolution) - remote solution: the DNS server manages this for all - resolving hostname to an ip address (inside
/etc/resolv.conf)
Record types
- A: IP to name
- AAAA: IPv6 to name
- CNAME: alias to name
🤔 What is a router?
- A device that connects different networks
🤔 What is the loopback address (aka home)
- Every host has this built-in virtual interface available
- aka
127.0.0.1 - aka
localhost
YAML
- for dictionaries you have to always have the same number of spaces
- lists are ordered
- hash for comments