Dear jean ,
you can install customization easily following these steps.
1.First activate developer mode , It can be easily done by attaching ?debug to your
local url immediatly after the
http://localhost:8016/web like http://localhost:8016/web?debug
2.Copy the customized modules into your addons folder you have specified in the conf file.
[options]
admin_passwd = admin
db_host = localhost
db_port = 5432
db_password = psql
db_user = nishadodoo11
xmlrpc_port = 8015
addons_path =/home/muhammednishad/odoo/odoo-11.0.post20180606/myaddons
in my case it is :
/home/muhammednishad/odoo/odoo-11.0.post20180606/myaddons
3.Now goto apps , on the right hand side , you can see update apps list option , use it.
4.Now on search , Clear default filters if any , Search your module by module name or
the name you have given in the manifest.
Hope it help