It's ok that I can export in this way, but how can I make it permanent? I want LD_PRELOAD to still be changed after a reboot. I'm using Ubuntu and Fedora
Ordinarily, you'd put your "export" line into whatever shell startup file is appropriate:
.zprofile, whatever, in your
If you want to make it permanent for every user, the various shells usually have system-wide config files in
/etc/profile exists on this linux box, but do read the man page to figure out which user-specific and which system-wide file to put it in.
Most distributions also have an
/etc/profile.d/ directory containing a group of .sh and .csh files. Creating a new file in this directory tends to keep items better organized and keeps
/etc/profile from getting cluttered.