Linux Mint 15 - Recieving DKPG error 127 when modifying packages -

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*after operation, 44.1 mb of additional disk space used. want continue [y/n]? y extracting templates packages: 100% setting install-info (4.13a.dfsg.1-10ubuntu4) ... /etc/environment: line 5: java_home: command not found dpkg: error processing install-info (--configure):  subprocess installed post-installation script returned error exit status 127 errors encountered while processing:  install-info e: sub-process /usr/bin/dpkg returned error code (1)*

this error running whenever try modify packages, in case trying install lxde. environment file looks :

*path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games" java_home=/usr/lib/jvm/jdk1.7.0_25/

to give more context, dkpg error began happening after went through long , arduous process setting android studio. feel solution simple, have been searching while , haven't been able resolve issue. appreciated, thank in advance

export java_home before executing command

export java_home=$java_home:/usr/lib/jvm/jdk1.7.0_25/

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