+DATE=$(date "+%Y%m%d_%H%M%S")
+# track xsession errors
+mv ~/.xsession-errors ~/.xsession-errors_${DATE};
+ln -sf ~/.xsession-errors_${DATE} ~/.xsession-errors-current;
+# delete old xsession error files
+find ~/ -maxdepth 1 -mindepth 1 -type f \
+ -iname '.xsession-errors*' -ctime +30 -delete;
+