How to configure environment variables in Ubuntu?

Question

I configured the environment variables $JAVA_HOME and $M2_HOME the etc/environment file through the root, as follows:

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:
JAVA_HOME=/usr/lib/jvm/java-8-oracle/:
CLASSPATH=$JAVA_HOME/lib/:
CLASSPATH:PATH=$JAVA_HOME/bin/:PATH:
$M2_HOME=/usr/share/maven/:
M2=$M2_HOME/bin:
PATH=$M2:$PATH"

broken lines for ease of viewing.

After restart the computer and type the command echo $JAVA_HOME or echo "$JAVA_HOME" displays nothing.

Where am I wrong?

All your variables are faulty. $M2_HOME=... should be M2_HOME=...; your XXX_HOME should not end with :, you have for some reason a " after PATH and at the last line. Shortly, your structure is completely wrong. — Olivier Grégoire
– Olivier Grégoire, Commented Aug 6, 2015 at 19:32
Hello Olivier Grégoire that was another doubt, what is the correct way to use the environment variables and where to put them? — ricardoramos
– ricardoramos, Commented Aug 6, 2015 at 19:43
Olivier Grégoire is now correct? I insert them at the end of .bashrc file? JAVA_HOME=/usr/lib/jvm/java-8-oracle/ CLASSPATH=$JAVA_HOME/lib/‌CLASSPATH PATH=$JAVA_HOME/bin/:PATH M2_HOME=/usr/share/maven/ M2=$M2_HOME/bin PA‌TH=$M2:$PATH — ricardoramos
– ricardoramos, Commented Aug 6, 2015 at 19:52

Dmitry Lukashin · Accepted Answer · 2015-08-06 19:29:11Z

1

Variable expansion does not work in /etc/environment.

https://help.ubuntu.com/community/EnvironmentVariables#A.2Fetc.2Fenvironment

Also it is not clear why do you have colons at the end of each line. PATH seems to have unclosed quote.

Maybe you should post the original file without line breaks?

answered Aug 6, 2015 at 19:29

Dmitry Lukashin

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2 Comments

ricardoramos Over a year ago

So the correct would put my ambinte variables at the end of my .bashrc file?

ricardoramos Over a year ago

Dmitry Lukashin used the colon as a separator

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:JAVA_HOME=/usr/lib/jvm/java-8-oracle/:CLASSPATH=$JAVA_HOME/lib/:CLASSPATH:PATH=$JAVA_HOME/bin/:PATH:$M2_HOME=/usr/share/maven/:M2=$M2_HOME/bin:PATH=$M2:$PATH"

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