pdfsam software package provides PDF Split and Merge, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install pdfsam
pdfsam is installed in your system.
Make ensure the pdfsam package were installed using the commands given below,
$ sudo dpkg-query -l | grep pdfsam *
You will get with pdfsam package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Text Processing |
| Package | pdfsam |
| Version | 1.1.4-2 |
| Description | PDF Split and Merge |
| Sub Section | Text |