Translations:Installation security hints/10/en
From LimeSurvey Manual
The web server (which runs LimeSurvey) is also running under a given identity (user). On Linux, this is usually the 'www', 'www-data' (on Debian/Ubuntu), 'apache' or 'nobody' user. However, some hosting companies use systems (such as suexec) that make it possible to run LimeSurvey scripts with your personal user. Of course, the web server user must have the right to read LimeSurvey files. However, only a small subset of LimeSurvey sub-directories must be writable by the web server user.