What is the most popular software for various types of Linux servers?

Question

linux

What software is most commonly used today for file servers, FTP servers, network service servers, DBMS, Web servers, Linux mail servers?

Answer 1

Well, if I got stuck in a dispute, I will also write an answer.
There are different tasks, ranging from a desktop workstation to various server tasks.
I will not write about the desktop, install ANY distribution kit you like with a default graphical shell - this will be the set of the most popular software. For example, I am writing from a laptop with ubuntu (the laptop is a good, stylish and expensive ultrabook asus ux391), everything works as it should.
But further - everything is more interesting. For small installations, the standard LAMP set is suitable - Linux, Apache (Nginx), MySQL (PostgreSQL), PHP.
For communication with screw machines - Samba.
Never install FTP (!!!) - use ssh / sftp - they are in the standard set, it's safer and more versatile.
Containerization like Docker/LXC/Kyberners and KVM/XEN virtualization are very popular right now. What is better here - I will not say, I use both. For fast things - containers, for separation - KVM.
The bases are different and Mysql and Postgres, the latter is nicer and can do much more, but not everyone can, alas. I prefer Redis / MongoDB / Kafka / Hbase / Elasticsearch but everything is for the task.
Of the web servers, I prefer Nginx, but there are products that are tailored to work with Apache.
For firewall settings, each distribution has rule generators - in ubuntu this is ufw. I use firehol.
Ask - I will add to the list.

Answer 2

Now the software that performs the tasks is most often used.

Answer 3

Install whatever you want, since almost all server applications work with docker, there is no difference today.
What will happen next no one knows