This man is too old to remember everything in his brain. Right now, he needs a place to write down what he has studied.
rm -rf dump.nod.gca_gcbmknod dump.nod.gca_gcb pgzip -f < dump.nod.gca_gcb > gca_gcb.dmp.gz &exp xxx/xxx@xxx tables=gca_file,gcb_file file=dump.nod.gca_gcb