java - 版本无法执行 java 文件

Question

java file in the directory; java command not working; .bashrc entry for java variable:

root@s1:/usr/lib/jvm/jdk1.8.0_202/bin# ls -ltr | grep java

-rwxr-xr-x 1 uucp 143   2293 Dec 12  2018 javapackager

-rwxr-xr-x 1 uucp 143   2293 Dec 12  2018 javafxpackager

-rwxr-xr-x 1 uucp 143 120604 Dec 16  2018 javaws

-rwxr-xr-x 1 uucp 143   1809 Dec 16  2018 java-rmi.cgi

-rwxr-xr-x 1 uucp 143   7412 Dec 16  2018 javap

-rwxr-xr-x 1 uucp 143   7412 Dec 16  2018 javah

-rwxr-xr-x 1 uucp 143   7416 Dec 16  2018 javadoc

-rwxr-xr-x 1 uucp 143   7412 Dec 16  2018 javac

-rwxr-xr-x 1 uucp 143   7332 Dec 16  2018 java

root@s1:/usr/lib/jvm/jdk1.8.0_202/bin# java -version

bash: /usr/lib/jvm/jdk1.8.0_202/bin/java: No such file or directory

root@s1:/usr/lib/jvm/jdk1.8.0_202/bin# cd

root@s1:~# cat .bashrc 

# ~/.bashrc: executed by bash(1) for non-login shells.

# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)

# for examples

export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_202

export PATH=$PATH:$JAVA_HOME/bin

Hello, I'm trying to install hadoop in virtualbox. I've extracted java packages in /usr/lib/jvm . When running java commands it's couldn't execute the java file in the path /usr/lib/jvm/jdk1.8.0_202/bin/java . You can also see all the users have execute permission.

Please help me identify the issue.

Answer 1

Try ./java --version on Linux bash you need to specify "./" for executables.