here is a solution, use visudo to edit /etc/sudoers file, and change this line from: Defaults env_reset to Defaults !env_reset
and solved this problem. ** Also affects: sudo (Ubuntu) Importance: Undecided Status: New -- gksudo --preserve-env can't keep environment variables https://bugs.launchpad.net/bugs/207167 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs