Unix is not a system one w/could use in 2017 for web development. All popular systems in use are based on Linux. The two main stream are Debian based distros, such as Ubuntu Server, or Redhat based, particularly CentOS.
So you should replace Unix and Linux with Ubuntu and CentOS.
Don't forget Debian itself ;-).
Sure!
Learning about Unix and the various flavours can most certaintly be helpful, FreeBSD and Illumos are both big players, knowing either or both of those is helpful if you move onto eg. POWER, which is a very much growing platform, where you'll encounter AIX. Just because you don't see it in the low end doesn't mean it doesn't exists, and that it isn't popular.
add Debian :-)
Hello, since this issue was still open and an OS list was deeply needed I created a PR to include some Linux distributions suitable for server use in production like RHEL, Debian, CentOS, etc. As well as two Unix based OS's (FreeBSD and macOS Server).
Please check it out here and share your thoughts in the PR so we can improve it 馃槃
This has been fixed and will be published in the coming release. Thank you 馃檹
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Don't forget Debian itself ;-).