How to set Java classpath in Linux?

I downloaded apache-log4j-1.2.16.zip and unziped it. I then renamed it as LOG4J_HOME and placed it in /home/appnetix folder which is my folder. I tried setting the classpath in the terminal using the following command :

[appnetix@Sanjeev ~]$ set classpath=%path%;LOG4J_HOME/log4j-1.2.16.jar;

That returned:

bash: LOG4J_HOME/log4j-1.2.16.jar: Permission denied

I tried doing this:

[appnetix@Sanjeev ~]$ set classpath=%path%;//home/appn开发者_如何学Cetix/LOG4J_HOME/log4j-1.2.16.jar;

But I got this:

bash: //home/appnetix/LOG4J_HOME/log4j-1.2.16.jar: Permission denied

Please help, I'm new in Linux (one month).

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export CLASSPATH=/home/appnetix/LOG4J_HOME/log4j-1.2.16.jar

or, if you already have some classpath set

export CLASSPATH=$CLASSPATH:/home/appnetix/LOG4J_HOME/log4j-1.2.16.jar

and, if also you want to include current directory

export CLASSPATH=$CLASSPATH:/home/appnetix/LOG4J_HOME/log4j-1.2.16.jar:.

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You have to use ':' colon instead of ';' semicolon.

As it stands now you try to execute the jar file which has not the execute bit set, hence the Permission denied.

And the variable must be CLASSPATH not classpath.

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Can you provide some more details like which linux you are using? Are you loged in as root? On linux you have to run export CLASSPATH = %path%;LOG4J_HOME/og4j-1.2.16.jar If you want it permanent then you can add above lines in ~/.bashrc file.