[Koha] Plugin Error

[SATISH]

Hi,

With Koha 17.11.06.000 On L-Ubuntu 16,04 Desktop from package installation
method,

I am getting follwoing error while uploading .kpz file at  Home › Tools ›
Plugins.


*Cannot unpack file to the plugins directory.Please verify that the Apache
user can write to the plugins directory.*

What is the right permission ??
.
As a root user, I have created plugins directory

drwxr-xr-x 6 gechlibrary-koha gechlibrary-koha 4096 Jun  8 22:48 gechlibrary
drwxr-xr-x 2 root             root             4096 Jun 12 17:28 plugins

I tried to change,
chown -R gechlibrary-koha:gechlibrary-koha /var/lib/koha/plugins/

drwxr-xr-x 6 gechlibrary-koha gechlibrary-koha 4096 Jun  8 22:48 gechlibrary
drwxr-xr-x 2 gechlibrary-koha gechlibrary-koha 4096 Jun 12 17:28 plugins


Alias /plugin/ "/var/lib/koha/plugins/" is updated in
/etc/apache2/sites-available/gechlibrary.conf

In both cases, I am not able to to perform upload plugin.

Please help.

Satish MV
Librarian
Govt. Engineering College, Hassan