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Installation

Note: The commands below download from the master branch. If the repository has been updated to use main or another default branch, adjust the URL accordingly. 
wget -O ldb.zip https://github.com/scanoss/ldb/archive/master.zip
unzip ldb.zip
cd ldb-master
make
make lib
sudo make install

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Directory Setup

In production environments, the Knowledge Base (KB) is typically stored on a dedicated disk or logical volume. Create your KB directory as follows: 
sudo mkdir -p /data/ldb/oss  # 'oss' is the KB name
sudo chown -R user:user /data/ldb  # Replace 'user' with your system username
sudo chmod -R 755 /data/ldb
Note: Replace user with the username that will run the SCANOSS Engine.
Create a symbolic link from the default LDB path (/var/lib/ldb) to your KB directory: 
sudo ln -s /data/ldb /var/lib/ldb
The subdirectories (purl, url, file, wfp) are created automatically during the KB import process — you do not need to create them manually.

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Verify Installation

Run the following command to confirm LDB is installed correctly: 
ldb
You should see the following output: 
Welcome to LDB 2.02
Use help for a command list and quit for leaving this session
To exit the LDB session, run: 
ldb> quit