问题
How can I uninstall Erlang/OTP which I use make install to build from source earlier. The install is pretty simple by using ./configure;make;make install;
The reason to uninstall is that I want to upgrade from Erlang R15B01 to Erlang R15B03.
Now I have:
# erl --version
Erlang R15B01 (erts-5.9.1) [source] [64-bit] [smp:2:2] [async-threads:0] [hipe] [kernel-poll:false]
Eshell V5.9.1 (abort with ^G)
1>
回答1:
There is an option --prefix=path of script configure, where path is a path to directory where you want to install an application. For instance:
./configure --prefix=/opt/erlang-R15B01
Do not forget to add appropriate path to PATH environment variable.
If you didn't use this option during previous installation then the default path was used (/usr or /usr/local) and you can just install new version above old one the same way -
./configure && make && make install.
回答2:
How to uninstall Erlang on Ubuntu:
sudo apt-get purge erlang*
Uninstall Erlang on Fedora:
sudo yum remove erlang*
If you installed erlang from source using the default home directory, you would need to rm -rf /usr/local/erlang/.
Additional cleanup might me required if you had manually copied libraries or executable to other folders, like */lib or */bin.
回答3:
If you using Erlang for development I would suggest looking into kerl VM manager. It allows you to have multiple VM "installed" with different configuration options and possibility of switching between them.
回答4:
As another alternative to kerl, we can also use erln8 to have multiple Erlang environment.
https://erln8.github.io/erln8/
来源：https://stackoverflow.com/questions/22396240/how-to-uninstall-or-upgrade-erlang-otp