Minimserver compatibility

[ciccio1112]

I upgraded the firmware on the WD unpacked file ejre-7u75-FCS-b13-linux-ppc-Headless-18_dec_2014.tar.gz folder /shares/Public/Java/ejre1.7.0_75
put the path /shares/Public/Java/ejre1.7.0_75/bin/java ln -s / usr / local / bin / java
but when I type java - version

-bash: line 7: java: command not found
if I write the test command ls -l /shares/Public/Java/ejre1.7.0_75/bin/java
He says:

ls: can not access /shares/Public/Java/ejre1.7.0_75/bin/java: No such file or directory