libapr1 software package provides Apache Portable Runtime Library, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libapr1
libapr1 is installed in your system.
Make ensure the libapr1 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libapr1 *
You will get with libapr1 package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Libraries |
| Package | libapr1 |
| Version | 1.5.1-3 |
| Description | Apache Portable Runtime Library |
| Sub Section | libs |