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_resetDefaults    mail_badpassDefaults    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 specificationroot    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。