If you are encountering issues while installing the Deep Security Agent on Linux Ubuntu or CentOS, the following steps can be followed:

1. On the affected machine, run the following command to update:

sudo apt-get update -y

2. After updating, run the following command to install the required package:

sudo apt-get install -y libapt-pkg5.0

3. Once the above package is installed, try installing the Deep Security Agent again.

Following the above steps should help resolve this issue.