how install ejabberd ubuntu



distributed, fault-tolerant Jabber/XMPP server
Install sudo apt install ejabberd

Ejabberd is a Jabber/XMPP server written in Erlang, featuring:
* distributed operation with load-balancing across a cluster;
* fault-tolerant database replication and storage on multiple nodes,
allowing nodes to be added or replaced “on the fly”;
* virtual hosting (several virtual domains can be served using a single
ejabberd instance);
* XMPP compliance;
* web-based administration;
* SSL/TLS support;
* conferencing via Multi-User Chat;
* IRC transport;
* Jabber Users Directory, based on users” vCards;
* service discovery;
* shared roster.