使用sudo运行时未在脚本中设置JAVA_HOME

我正在尝试运行一个需要安装Java并设置JAVA_HOME环境变量的安装脚本。

我已经设置好了JAVA_HOME，/etc/profile并且还在一个我已调用的文件java.sh中/etc/profile.d。我可以echo $JAVA_HOME并获得正确的回应，我甚sudo echo $JAVA_HOME至可以并获得正确的回应。

在install.sh我要运行的中，我插入了echo $JAVA_HOME。当我不运行此脚本时，会sudo看到j​​ava目录；当我运行脚本时sudo它是空白的。

任何想法为什么会这样？

我正在运行CentOS。

出于安全原因，sudo可以清除环境变量，这就是为什么它可能不选择$ JAVA_HOME的原因。在/etc/sudoers文件中查找env_reset。

来自man sudoers：

env_reset   If set, sudo will reset the environment to only contain the following variables: HOME, LOGNAME, PATH, SHELL, TERM, and USER (in addi-
           tion to the SUDO_* variables).  Of these, only TERM is copied unaltered from the old environment.  The other variables are set to
           default values (possibly modified by the value of the set_logname option).  If sudo was compiled with the SECURE_PATH option, its value
           will be used for the PATH environment variable.  Other variables may be preserved with the env_keep option.

env_keep    Environment variables to be preserved in the user's environment when the env_reset option is in effect.  This allows fine-grained con-
           trol over the environment sudo-spawned processes will receive.  The argument may be a double-quoted, space-separated list or a single
           value without double-quotes.  The list can be replaced, added to, deleted from, or disabled by using the =, +=, -=, and ! operators
           respectively.  This list has no default members.

因此，如果您希望它保留JAVA_HOME，请将其添加到env_keep中：

Defaults   env_keep += "JAVA_HOME"

或者，将其设置JAVA_HOME为root ~/.bash_profile。

使用-E（保留环境）选项运行sudo（请参阅手册文件），或将JAVA_HOME放入install.sh脚本中。