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confused-demon
Asked: 2012-09-18 03:43:21 +0800 CST

Ubuntu, program currently not installed

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I have Ubuntu 10.04.4.

I downloaded and installed scala (.tgz archive), unpacked into /opt, set rights for read and execute in bin for all users. Also updated PATH in /etc/environment

When I run program just with scala command, though name is autocompleted it is not run:

root@ubuntu:/home/user# scala
  The program 'scala' is currently not installed.  You can install it by typing:
  apt-get install scala

But if I use full path to executable it works.

Executables from scala/bin is in PATH (autocomplete works). What am I doing wrong?

root@ubuntu:/home/user# which scala
root@ubuntu:/home/user# whereis scala
scala: /opt/scala-2.9.2/bin/scala /opt/scala-2.9.2/bin/scala.bat /opt/scala/bin/scala /opt/scala/bin/scala.bat
root@ubuntu:/home/user# echo $PATH
${SCALA_HOME}/bin:${JAVA_HOME}/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
root@ubuntu:/home/user# echo $SCALA_HOME
/opt/scala

root@ubuntu:/home/user# cat /etc/environment 
JAVA_HOME="/usr/lib/jvm/java-7-oracle"
SCALA_HOME="/opt/scala"
PATH=${SCALA_HOME}/bin:${JAVA_HOME}/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
linux

2 Answers

  1. Best Answer

    Your PATH statement looks wrong, given your output:

    root@ubuntu:/home/user# echo $PATH
${SCALA_HOME}/bin:${JAVA_HOME}/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games

    The ${SCALA_HOME} should have expanded out there.

    What did you add to your /etc/environment?

    Update:

    Ah, OK. /etc/environment is not processed by shell, so variable expansions, like you are trying in your PATH, will not work there. It only expects key-value pairs.

    Put your updated PATH into /etc/profile or something similar. You should be able to keep your $SCALA_HOME and $JAVA_HOME settings in /etc/environment, though, but the variable expansion will not work in there.

    (A similar question: https://askubuntu.com/questions/78856/referencing-environment-variables-in-etc-environment)

    • 3

  2. You need to add /opt/scala/bin to your $PATH. Judging from the path, your Scala installation was probably compiled from source rather than installed with Ubuntu's package management (apt/dpkg).

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