参考

• http://www.jianshu.com/p/bd37bb185e8b
• http://www.itdadao.com/articles/c15a711604p0.html

网上找了许多，都是oschina的源，阿里的源也试了，都很慢。最终修改源列表如下，半分钟就好了。具体是哪一行发生了作用，就不清楚了。

~/.sbt$ cat repositories
[repositories]
local
aliyun-nexus: http://maven.aliyun.com/nexus/content/groups/public/  
ibiblio-maven: http://maven.ibiblio.org/maven2/
typesafe-ivy: https://dl.bintray.com/typesafe/ivy-releases/, [organization]/[module]/(scala_[scalaVersion]/)(sbt_[sbtVersion]/)[revision]/[type]s/[artifact](-[classifier]).[ext]
uk-repository: http://uk.maven.org/maven2/
jboss-repository: http://repository.jboss.org/nexus/content/groups/public/

osc: http://maven.oschina.net/content/groups/public/
typesafe: http://repo.typesafe.com/typesafe/ivy-releases/, [organization]/[module]/(scala_[scalaVersion]/)(sbt_[sbtVersion]/)[revision]/[type]s/[artifact](-[classifier]).[ext], bootOnly
sonatype-oss-releases
maven-central
sonatype-oss-snapshots

测试一下，启动迅速，再也不用等待了。

~/.sbt$ sbt
[info] Set current project to root--sbt (in build file:/home/bit/.sbt/)
> 

==============
20170115更新
在sbt编译spark的时候又报错了，连不上服务器。精简一下文件，不是越多越好，直接定位到阿里云提供的源即可。

$ dpkg -L sbt
/usr/share/sbt-launcher-packaging/conf/sbtopts
/usr/share/sbt-launcher-packaging/conf/sbtconfig.txt

这两个文件增加一行，让源生效：
-Dsbt.override.build.repos=true

$ cat repositories
[repositories]
local
aliyun-nexus: http://maven.aliyun.com/nexus/content/groups/public/  
typesafe: http://repo.typesafe.com/typesafe/ivy-releases/, [organization]/[module]/(scala_[scalaVersion]/)(sbt_[sbtVersion]/)[revision]/[type]s/[artifact](-[classifier]).[ext], bootOnly
sonatype-oss-releases
maven-central
sonatype-oss-snapshots