How to find the installation path for a software under linux?

You can use:

which fluidpoint

to see where it is executing from (if it's in your $PATH). Or:

find / -name fluidpoint 2> /dev/null

to look for a file named fluipoint and redirect errors on virtual filesystems.
Usually they are in /sbin, /usr/sbin, /usr/local/bin or ~ as a hidden directory.

If you use an RPM based distribution (CentOS, RHEL, SUSE, openSUSE) you can use rpm -ql Example: rpm -ql findutils /bin/find /usr/bin/find /usr/bin/xargs /usr/share/doc/packages/findutils /usr/share/doc/packages/findutils/AUTHORS /usr/share/doc/packages/findutils/COPYING /usr/share/doc/packages/findutils/NEWS /usr/share/doc/packages/findutils/README /usr/share/doc/packages/findutils/THANKS /usr/share/doc/packages/findutils/TODO /usr/share/info/find.info.gz /usr/share/man/man1/find.1.gz Things aren't installed to locations in the Linux/UNIX world like they are in the Windows (and even somewhat in the Mac) world. They are more distributed. Binaries are in /bin or /sbin, libraries are in /lib, icons/graphics/docs are in /share, configuration is in /etc and program data is in /var. The /bin,lib,sbin contain the core applications needed for booting and the /usr contains all the other user and system applications