Installing QGIS for OpenGeo Suite??
Boundless provides packages for QGIS on both Windows and OS X.
To use QGIS with Linux, please see the QGIS community installation instructions.
For Linux users, please do not try to run QGIS on the same machine as OpenGeo Suite, as package conflicts will occur (specifically with GDAL). If you install OpenGeo Suite on a machine that has QGIS, QGIS may be automatically uninstalled!
Instead, use QGIS on a different machine and connect to OpenGeo Suite services from there.