We stopped updating this site on June 30, 2024. From now on, information on Educational Campus-wide Computing System (ECCS) will be provided at utelecon The Portal Site of Information Systems @ UTokyo.
There had been a report that the line editing function was inoperable when executing /usr/local/bin/irb in the Mac environment.
The problem has been solved as of September 27, 2017 at noon.
We apologize to users for any inconveniences this may have caused you.