ubuntu下运行sudo Java 时提示“sudo: java: command not found”。在网上找了，其中很多方法都提示要修改/etc/profile的配置，或是修改/etc/environment的配置。配置完sudo java就可以运行了，但是改完之后依然无效。
根据一个大神的指引，应该是修改/etc/sudoers这个文件，
sudo vim /etc/sudoers
显示内容如下：
#
# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults env_reset
Defaults mail_badpass
Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin:/usr/java/jdk1.8.0_131/bin" # Host alias specification # User alias specification # Cmnd alias specification # User privilege specification
root ALL=(ALL:ALL) ALL # Members of the admin group may gain root privileges
%admin ALL=(ALL) ALL # Allow members of group sudo to execute any command
%sudo ALL=(ALL:ALL) ALL # See sudoers(5) for more information on "#include" directives: #includedir /etc/sudoers.d
在Defaults secure_path 中添加Java的路径。
再次运行 sudo java 就可以使用了。