bash-3.2$ export SUBJECTS_DIR=/Applications/freesurfer/7.2.0/tbi/TBN 

bash-3.2$ echo $SUBJECTS_DIR

/Applications/freesurfer/7.2.0/tbi/TBN

bash-3.2$ ls *.nii | parallel --jobs 8 recon-all -s {.} -i {} -all -qcache

ls: *.nii: No such file or directory

Academic tradition requires you to cite works you base your article on.

If you use programs that use GNU Parallel to process data for an article in a

scientific publication, please cite:

  Tange, O. (2022, August 22). GNU Parallel 20220822 ('Rushdie').

  Zenodo. MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://doi.org/10.5281/zenodo.7015730

This helps funding further development; AND IT WON'T COST YOU A CENT.

If you pay 10000 EUR you should feel free to use GNU Parallel without citing.

More about funding GNU Parallel and the citation notice:

MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://www.gnu.org/software/parallel/parallel_design.html#citation-notice

To silence this citation notice: run 'parallel --citation' once.