Hello, Try: echo '. /etc/fsl/fsl.sh' >> ~/.bashrc This writes . /etc/fsl/fsl.sh in the end of the ~/.bashrc file. After executing this command you open another terminal and FSL might work now. You only have to do this once. Cheers, Alexandre Manhães Savio <[log in to unmask]> Grupo de Inteligencia Computacional <http://www.ehu.es/ccwintco> Departamento de CCIA UPV/EHU On 12 December 2011 14:33, Anna Blume <[log in to unmask]> wrote: > Hello Alex, > > thank you very much for your help so far! I'm afraid I'll have to ask the > next question now.. > > I've installed Ubuntu 10.04 LTS and also managed to install FSL - at least > I'm getting the GUI. > But now when trying to run fslroi using this command: > fslroi vol_0001.nii cutvol.nii 0 256 90 256 0 176 > I get the error message "fslroi: command not found" > > In the fsl-folder there is a file with the name "fslroi" (usr/lib/fsl$ ls) > but I can neither install nor open it, it says "couldn't find package > fslroi". > > What's wrong? What shall I do? > > Thank you! Best, Anna > > > >