In linux, how to find the installation path of java
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han@ubuntu:
/etc
$
whereis
java
java:
/usr/bin/java
/usr/share/java
/usr/lib/jvm/java-8-openjdk-amd64/bin/java
/usr/share/man/man1/java
.1.gz
han@ubuntu:
/etc
$
ls
-lrt
/usr/bin/java
lrwxrwxrwx 1 root root 22 4月 2 15:54
/usr/bin/java
->
/etc/alternatives/java
han@ubuntu:
/etc
$
ls
-lrt
/etc/alternatives/java
lrwxrwxrwx 1 root root 46 4月 2 15:54
/etc/alternatives/java
->
/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
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Then edit / etc / profilewen file, add at the end of file
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export
JAVA_HOME=
/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
export
PATH=$JAVA_HOME
/bin
:$PATH
export
CLASSPATH=.:$JAVA_HOME
/lib/dt
.jar:$JAVA_HOME
/lib/tools
.jar
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Then, run
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source
/etc/profile
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View JAVA_HOME environment variable
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2
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han@ubuntu:
/etc
$
echo
$JAVA_HOME
/usr/lib/jvm/java-8-openjdk-amd64
|
|
1
2
3
4
5
6
|
han@ubuntu:
/etc
$
whereis
java
java:
/usr/bin/java
/usr/share/java
/usr/lib/jvm/java-8-openjdk-amd64/bin/java
/usr/share/man/man1/java
.1.gz
han@ubuntu:
/etc
$
ls
-lrt
/usr/bin/java
lrwxrwxrwx 1 root root 22 4月 2 15:54
/usr/bin/java
->
/etc/alternatives/java
han@ubuntu:
/etc
$
ls
-lrt
/etc/alternatives/java
lrwxrwxrwx 1 root root 46 4月 2 15:54
/etc/alternatives/java
->
/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
|
Then edit / etc / profilewen file, add at the end of file
|
1
2
3
|
export
JAVA_HOME=
/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
export
PATH=$JAVA_HOME
/bin
:$PATH
export
CLASSPATH=.:$JAVA_HOME
/lib/dt
.jar:$JAVA_HOME
/lib/tools
.jar
|
Then, run
|
1
|
source
/etc/profile
|
View JAVA_HOME environment variable
|
1
2
|
han@ubuntu:
/etc
$
echo
$JAVA_HOME
/usr/lib/jvm/java-8-openjdk-amd64
|