Hi, Leah-

The output of "which Xvfb" demonstrates that that program is not currently installed on that system. From the afni_system_check.py output, your system appears to be Red Hat Linux, so you can please pass along this page of install instructions to your IT folks:
[afni.nimh.nih.gov]
... in particular, the dependency list for Red Hat in this section:
[afni.nimh.nih.gov]
... which includes "Xvfb" (but they should proabbly just copy+paste that whole chunk).

But they should probably go through the R install stuff, too, it appears. Note that you will really want the R-3.6.* version to be your main one-- R-3.3.* is suuuuper old and won't have the necessary capabilities for running any of AFNI's R-dependent programs.

Also, this output of the afni_system_check.py shows that your version of AFNI is quite old-- just about coming up on its one year birthday!:

afni version : Precompiled binary linux_openmp_64: Jul 19 2019

... so you should ask your IT to run:

@update.afni.binaries -d

to update it.


... And please see the things that you can do for helping your AFNI setup (sudo password *not* required), as listed in the bottom of the afni_system_check.py output. You can copy+paste each of these into the terminal:

For: * shell bash: consider sourcing (non-login) .bashrc from (login) .bash_profile

echo "" >> ~/.bash_profile
echo "source ~/.bashrc" >> ~/.bash_profile
echo "" >> ~/.bash_profile

For: * please run: cp /usr/local/afni/19.2.04/AFNI.afnirc ~/.afnirc

cp /usr/local/afni/19.2.04/AFNI.afnirc ~/.afnirc

For: * please run: "suma -update_env" for .sumarc

suma -update_env

For: * please run: apsearch -update_all_afni_help

apsearch -update_all_afni_help

--pt