Where is SCALA_HOME on Ubuntu?

Question

I installed Scala on Ubuntu using the following

sudo apt-get install scala 

~$ which scala
/usr/bin/scala

~$ whereis scala
scala: /usr/bin/scala /usr/bin/X11/scala /usr/share/man/man1/scala.1.gz

~$ scala -version
Scala code runner version 2.9.1 -- Copyright 2002-2011, LAMP/EPFL

My question is what should I put in the variable SCALA_HOME? /usr/bin ?

Try using `SCALA_HOME=/usr/share/java`. There's a possibility may need to symlink specific jars from that directory into `/usr/share/java/lib`. I think a cleaner and more reliable solution is installing scala from the tarball into a single directory. — Alex, Apr 02 '13 at 20:41
1. cd / 2. sudo find . -name scala-compiler*.jar 3. check if its available in which of the following location a. /usr/shar/java b. /usr/share/scala/lib/ 4. the directory where scala compiler jar is present is scala home — urmalp, Oct 10 '15 at 22:56

score 17 · Answer 1 · edited Nov 30 '16 at 15:05

Today I installed scala using "apt-get install scala" and confirmed the scala jar files are located in /usr/share/java

You should be able to set your SCALA_HOME to /usr/share/java and have it all work. I assume you want to use NetBeans so you will need to set SCALA_HOME in your .profile (or .bash_profile) rather than in your .bashrc because NetBeans won't see any variables set in your .bashrc unless you start it from the command line

$ find / -maxdepth 6 -iname \*scala\*jar 2> /dev/null
/usr/share/java/scala-dbc.jar
/usr/share/java/scala-partest.jar
/usr/share/java/scala-partest-2.9.1.jar
/usr/share/java/scala-dbc-2.9.1.jar
/usr/share/java/scalacheck.jar
/usr/share/java/scalap.jar
/usr/share/java/scala-library-2.9.1.jar
/usr/share/java/scala-compiler-2.9.1.jar
/usr/share/java/scala-library.jar
/usr/share/java/scalacheck-2.9.1.jar
/usr/share/java/scala-compiler.jar
/usr/share/java/scala-swing-2.9.1.jar
/usr/share/java/scalap-2.9.1.jar
/usr/share/java/scala-swing.jar

score 12 · Answer 2 · edited Jun 03 '14 at 19:14

12

For me its: /usr/share/java/scala I determined this by doing dpkg -L scala

This assumes you install scala using APT.

edited Jun 03 '14 at 19:14

TN888

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answered May 23 '14 at 22:31

Jeremy

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I only have `jline.jar` in that folder... On the other hand if you go one level up that is `/ust/share/java/` you get all the scala-related goodies. – rbaleksandar Nov 22 '15 at 11:41

score 9 · Accepted Answer · edited Aug 07 '17 at 08:06

9

As of today I couldn't find an easy (and reliable) way of setting this.

As per Alex (in the comment above) installing from tarball (downloaded from scala-lang.org) into /location/of/scala/untar

Then I set export SCALA_HOME=/location/of/scala/untar in my .bashrc Everything works for now!

edited Aug 07 '17 at 08:06

nitinr708

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answered Apr 09 '13 at 14:08

Soumya Simanta

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Remove the `$`. That symbol is used to actually call the value of the variable. – rbaleksandar Nov 22 '15 at 11:48

score 6 · Answer 4 · answered Oct 05 '15 at 13:02

6

I had the same issue and I did some digging This takes into account that you are using sudo dpkg -i scala-2.11.4.deb; where the debian package has been downloaded

The SCALA_HOME should be /usr/share/scala; This is based on the following

/usr/bin/scala is a symbolic link to /usr/share/scala/bin/scala
/usr/bin/X11/scala is also a symbolic link to /usr/share/scala/bin/scala

The way I see the scala package is installed in /usr/share/scala which should be your SCALA_HOME

answered Oct 05 '15 at 13:02

DataGuru

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Scala from Ubuntu's repositories is nowhere to be found in the directories you have mentioned. I wonder who thought that it's funny to waste hours in searching for the damn location where this thing is installed instead of just using it?! -_- – rbaleksandar Nov 22 '15 at 11:40

score 2 · Answer 5 · edited Aug 07 '17 at 07:37

2

If you have installed Scala using

$apt-get install scala

then, after a successful install to see where it installed, run

which scala

If this command shows you the path to scala binaries. Now run

pwd

Now export SCALA_HOME path into either of these environment files

~/.bashrc

or

/etc/profile

export SCALA_HOME=<output of pwd>

edited Aug 07 '17 at 07:37

nitinr708

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answered Jan 14 '15 at 09:14

user4452661

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I like your method better, but you might want to edit your answer to include cd to directory provided by `which scala` or better yet, just copy it and paste into the profile. – Shanemeister Apr 28 '18 at 18:22

score 2 · Answer 6 · edited Jun 05 '16 at 13:55

2

I installed the untarred scala into /usr/local/share as it is on the scala download site.

In my .bashrc, I placed the following line:

export PATH="/usr/local/share/scala-2.11.8/bin:$PATH"

works great from terminal regardless of what directory I'm in.

edited Jun 05 '16 at 13:55

Maxim Kolesnikov

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answered Jun 05 '16 at 05:57

wayneeusa

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score -2 · Answer 7 · answered Jul 27 '13 at 19:12

-2

The SCALA_HOME should be the directory where you install scala from. For example, the name of this directory may be scala-2.9.2.

answered Jul 27 '13 at 19:12

Seraph

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I think the question was: for ubuntu, where might scala be in order that I can properly set SCALA_HOME. – Richard Sitze Jul 27 '13 at 19:39
OK. I think usually the 'sudo apt-get' command will install software under /opt or /usr/local. Maybe he can try to find scala-2.9.2 folder under those directories – Seraph Sep 10 '13 at 22:03
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@Seraph any package that touches either of those directories is by definition broken – stew Jun 03 '14 at 19:37

Where is SCALA_HOME on Ubuntu?

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