Hi, The R-admin manual says: "If installing packages on a Unix-alike to be used by other users, ensure that the system umask is set to give sufficient permissions (see also Sys.umask in R). (To a large extent this is unnecessary in recent versions of R, which install packages as if umask = 022.)" I want install.packages() to honor my umask which is 002. I can't find a way to do that; is it possible? My goal is for any user in a specific group to be able to update packages installed by any other user in that group. (This is on an Ubuntu machine.) I've also tried setting a recursive acl on $R_HOME/library in which group write permission is always set, but install.packages() does not seem to honor that. (For the record, this question was asked before (https://stat.ethz.ch/pipermail/r-help/2012-August/321839.html) but not answered.) Thanks, Dan