osboxes@osboxes:~/Desktop/WASM-workdir/emsdk$ ./emsdk install emscripten-1.7.8
Installing tool 'emscripten-1.7.8'..
Downloading: /home/osboxes/Desktop/WASM-workdir/emsdk/zips/emscripten-1.7.8.tar.gz from https://s3.amazonaws.com/mozilla-games/emscripten/packages/emscripten-1.7.8.tar.gz, 35821822 Bytes
Unpacking '/home/osboxes/Desktop/WASM-workdir/emsdk/zips/emscripten-1.7.8.tar.gz' to '/home/osboxes/Desktop/WASM-workdir/emsdk/emscripten/1.7.8'
Done installing tool 'emscripten-1.7.8'.
osboxes@osboxes:~/Desktop/WASM-workdir/emsdk$ ./emsdk activate emscripten-1.7.8
Writing .emscripten configuration file to user home directory /home/osboxes/
The Emscripten configuration file /home/osboxes/.emscripten has been rewritten with the following contents:

import os
LLVM_ROOT='/home/osboxes/Desktop/WASM-workdir/emsdk/clang/e1.38.13_64bit'
EMSCRIPTEN_NATIVE_OPTIMIZER='/home/osboxes/Desktop/WASM-workdir/emsdk/clang/e1.38.13_64bit/optimizer'
BINARYEN_ROOT='/home/osboxes/Desktop/WASM-workdir/emsdk/clang/e1.38.13_64bit/binaryen'
NODE_JS='/home/osboxes/Desktop/WASM-workdir/emsdk/node/8.9.1_64bit/bin/node'
EMSCRIPTEN_ROOT='/home/osboxes/Desktop/WASM-workdir/emsdk/emscripten/1.7.8'
SPIDERMONKEY_ENGINE = ''
V8_ENGINE = ''
TEMP_DIR = '/tmp'
COMPILER_ENGINE = NODE_JS
JS_ENGINES = [NODE_JS]

To conveniently access the selected set of tools from the command line, consider adding the following directories to PATH, or call 'source ./emsdk_env.sh' to do this for you.

   /home/osboxes/Desktop/WASM-workdir/emsdk:/home/osboxes/Desktop/WASM-workdir/emsdk/clang/e1.38.13_64bit:/home/osboxes/Desktop/WASM-workdir/emsdk/node/8.9.1_64bit/bin:/home/osboxes/Desktop/WASM-workdir/emsdk/emscripten/1.7.8
Set the following tools as active:
   clang-e1.38.13-64bit
   node-8.9.1-64bit
   emscripten-1.7.8

osboxes@osboxes:~/Desktop/WASM-workdir/emsdk$