DATE=$(date "+%Y%m%d_%H%M%S")
# track xsession errors
mv ~/.xsession-errors ~/.xsession-errors_${DATE};
-ln ~/.xsession-errors-current ~/.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;