回声HADOOP_HDFS_HOME的环境变量不起作用

Question

Ubuntu 16.04 and hadoop yarn

I installed hadoop in /usr/local/hadoop and needed to edit a few environment variables which are located in /etc/environment .

I tried to edit them via wah in root mode.

JAVA_HOME="/usr/lib/jvm/java-8-oracle"
HADOOP_HDFS_HOME="/usr/local/hadoop"

My console Inputs after the edits:

echo $JAVA_HOME => Is it OK for root mode or not?

echo $HADOOP_HDFS_HOME => It displays nothing unless I use that command in root mode.

I tried to edit the environment variables in other ways, but it is still the same.

Answer 1

after the edits

Did you try to either open a brand new terminal or source /etc/environment before echoing? Your edits will not be reflected until you do this

And if you want to edit a variable for a particular user, not the entire system, put the variables in a ~/.profile file