warn npm install --global gatsby

[EthanAIPro]

system environments:
os:ubuntu16. 0.4 x64
nodejs:v6.11.1
npm: 5.3.0

when I Install the “Hello World” starter reference https://www.gatsbyjs.org/tutorial/part-one/.

npm install --global gatsby

detail output:
root@jileilei-virtual-machine:/home/jileilei/gatsbyjslearn# npm install --global gatsby
/usr/bin/gatsby -> /usr/lib/node_modules/gatsby/dist/gatsby-cli.js

uws@0.14.5 install /usr/lib/node_modules/gatsby/node_modules/uws
node-gyp rebuild > build_log.txt 2>&1 || exit 0

sh: 1: cannot create build_log.txt: Permission denied
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.2 (node_modules/gatsby/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

• gatsby@1.5.0

[EthanAIPro]

When I do "npm install --global gatsby" second times,occur follows.But I can gatsby new now
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.2 (node_modules/gatsby/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

[pigooosuke]

I've got the same problem.
But, above WARNs are about mismatch with Mac os option.
if you avoid from the error npm install --global gatsby --no-optional.
But , i think a install problem is depended on another point.
Do you have "gatsby new gatsby-site" logs?

[EthanAIPro]

thanks @pigooosuke .
my "gatsby new gatsby-site" logs:
jileilei@jileilei-virtual-machine:~/gatsbyjslearn$ gatsby new gatsby-site
2017-07-30T09:38:08+0800 init-starter.js:111 (clone) Cloning git repo git://github.com/gatsbyjs/gatsby-starter-default.git to gatsby-site...
2017-07-30T09:38:11+0800 init-starter.js:118 () Created starter directory layout
2017-07-30T09:38:11+0800 init-starter.js:48 (install) Installing packages...

uws@0.14.5 install /home/jileilei/gatsbyjslearn/gatsby-site/node_modules/uws
node-gyp rebuild > build_log.txt 2>&1 || exit 0

added 1232 packages in 70.208s

[pigooosuke]

only these? it's seemed like succeess.
if so, it's no problem.

[EthanAIPro]

I get it,thanks @pigooosuke