diff --git a/03-developer-how-to-for-modules.md b/03-developer-how-to-for-modules.md
index 2db0483ec54530d21e9c820691eda81e14483e74..d2ef06c05368f2bef0320682b2c09324df8bb41c 100644
--- a/03-developer-how-to-for-modules.md
+++ b/03-developer-how-to-for-modules.md
@@ -560,27 +560,46 @@ Creating a new SDN plugin is quite easy following these steps: `update_of_flows`
 
 ## Developer Guide for OSM client
 
-### Getting Started
+The OSM CLI is installed by default in the own host where OSM is installed (i.e. it does not run in a docker container).
+
+However, in order to have a local instalation ready for development, you will need to clone the CLI client repo, remove the installed debian package (if OSM has been already installed), and then re-install it by using `python pip3`.
 
-TODO: fill in
+### Remove debian package
+
+```bash
+# check if already present, and other osm packages
+dpkg -l | grep python3-osm
+# Remove debian package
+sudo apt-get remove python3-osmclient -y
+# do not remove python3-magic python3-pycurl python3-osm-im
+```
 
 ### Installation procedure
 
+To install it
+
 ```bash
 # Ubuntu 18.04 pre-requirements
-sudo apt-get install python3-pip libcurl4-openssl-dev libssl-dev
-# Centos pre-requirements:
-# sudo yum install python3-pip libcurl-devel gnutls-devel
-sudo -H python3 -m pip install python-magic
-# Install OSM Information model
-sudo -H python3 -m pip install git+https://osm.etsi.org/gerrit/osm/IM --upgrade
-# Clone the osmclient repo and install OSM client from the git repo.
+# Install and upgrade pip3
+python3 -m pip install pip -U --user
+# Install dependencies (not needed if package python3-osmclient has been installed as part of OSM installation)
+sudo -H apt-get install -y python3-pycurl
+python3 -m pip install git+https://osm.etsi.org/gerrit/osm/IM.git#egg=osm-im
+# Clone and configure gerrit commit-msg hook
 git clone https://osm.etsi.org/gerrit/osm/osmclient
-cd osmclient
-python3 -m pip install --user -e .
-# logout and login so that PATH can be updated. Executable osm will be found in /home/ubuntu/.local/bin
+curl -Lo osmclient/.git/hooks/commit-msg http://osm.etsi.org/gerrit/tools/hooks/commit-msg
+chmod u+x osmclient/.git/hooks/commit-msg
+# Install osmclient using pip3 with the -e option
+python3 -m pip install --user -e osmclient
+# Note: Maybe you must logout and login to have "/home/ubuntu/.local/bin" at PATH before executing osm
 ```
 
+Any changes done at your cloned osmclient folder applies to 'osm' command. Relevant code files are:
+
+- **osmclient/scripts/osm.py**: main entry when using CLI
+- **osmclient/client.py**: main entry when used as library
+- **osmclient/sol005**: there is a module per command
+
 To uninstall, just:
 
 ```bash