You'll probably want to arrange to run the executable each time your machine boots or you log on. Some examples follow.

Automatic startup on Unix

Users have contributed scripts for automatic startup of BOINC on various versions of Unix:

Red Hat Linux. (includes general instructions for installing on Unix systems).
Linux with KDE.
Red Hat 9, should also work on Solaris
Gentoo Linux (from Gabor Nagy)
HPUX (mostly relevant to UNIX in general)
An init script for running BOINC under SuSE Linux (9.2 and 9.3)

Automatic startup on Mac OS X

Instructions from Paul Buck's BOINC Owner's Manual.
Instructions from Berki Yenigun, deadsmile at minitel.net
Running BOINC as a system service on Mac OS X by Ivan Stegic.

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