Open Source Erlang for DEBIAN ----------------------------- This project (Erlang for Debian) is hosted on Salsa: https://salsa.debian.org/erlang-team/packages/erlang (the project page) https://salsa.debian.org/erlang-team/packages/erlang.git (the Git repository) mailto:pkg-erlang-devel@alioth-lists.debian.net (theh mailing list) ---------------- Note, that if you want to get Erlang documentation, you'll have to install erlang-doc (for docs in HTML). ---------------- Starting from version 1:22.0.7+dfsg-2 erlang-wx is built using wxWidgets GTK 3 implementation. This means that it uses Wayland backend if available. And since wxGLCanvas still doesn't support Wayland, any application that uses wxGLCanvas module has to be executed with x11 backend (see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=900678 and https://trac.wxwidgets.org/ticket/17702 for additional information). To do that, one can use the GDK_BACKEND environment variable, for example GDK_BACKEND=x11 wings3d ---------------- Starting from version 1:21.2.2+dfsg-1 the erlang-base package provides systemd socket and unit files for the epmd daemon, which are enabled by default. This causes the executed epmd to be owned by a separate user which is more secure in multi-user environment. (By default, the first distributed Erlang application starts the epmd daemon, and then it can kill it disrupting the other epmd clients.) To start/stop epmd execute systemctl start epmd.socket systemctl stop epmd.socket respectively. Notice, that they bind to all the network interfaces, so if you want to restrict the Erlang distribution for localhost only, you'd have to edit the socket unit file. Execute systemctl edit epmd.socket and then put the following lines into the opened editor: [Socket] BindToDevice=lo Then reload the systemd daemon: systemctl daemon-reload and start epmd.socket. After that epmd will listen on loopback only. Alternatively, you could add the following directives to the epmd.socket: systemctl edit epmd.socket And then add: [Socket] IPAddressDeny=any IPAddressAllow=localhost (An option takes a list of networks for its value. See systemd.resource-control(5) for details.) And of course, you could use a firewall to block unwanted connections to epmd. If you never plan to use distributed Erlang, you can disable or even mask the epmd units, e.g. systemctl disable epmd.socket or systemctl mask epmd.socket In the former case another service like ejabberd might enable the socket by dependency. -- Sergei Golovan Fri, 28 Dec 2018 15:46:09 +0300