sudo语法 MACHINE=(RUN_AS_USER) MACHINE是指什么?有案例吗?
时间: 2024-05-30 17:14:28 浏览: 13
sudo语法中的MACHINE=(RUN_AS_USER)表示在MACHINE主机上,RUN_AS_USER用户有sudo权限,可以执行一些特定的操作。这种语法常用于多用户环境下,以便管理员可以授权给其他用户一些特定的权限。举个例子,如果想要允许用户bob在主机ubuntu上以root权限执行apt-get update命令,那么可以在sudoers文件中添加以下条目:bob ubuntu=(root) apt-get update
相关问题
如果是linux呢? JAVA_HOME应该是jvm吗
在Linux系统上,JAVA_HOME的设置方法与Windows系统类似。您需要设置JAVA_HOME环境变量为JDK的安装路径。
通常情况下,JDK的安装路径在`/usr/lib/jvm`或者`/usr/java`目录下。您可以使用以下命令来查找JDK的安装路径:
```sh
$ sudo update-alternatives --config java
```
该命令会列出系统中所有安装的Java版本,并提示您选择要使用的版本。在选择后,它将显示JDK的安装路径,例如:
```
There are 2 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
0 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 auto mode
1 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 manual mode
* 2 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 manual mode
Press <enter> to keep the current choice[*], or type selection number:
```
在这个例子中,JDK的安装路径是`/usr/lib/jvm/java-8-openjdk-amd64`。因此,您的JAVA_HOME应该设置为`/usr/lib/jvm/java-8-openjdk-amd64`。
希望这可以帮助您在Linux上设置正确的JAVA_HOME环境变量!
to run a command as administraor (user "root"),use "sudo<command>",see"man sudo_root" for details
Thank you for the information. Yes, the "sudo" command is used to run a command with administrative privileges. When you use "sudo", you are essentially telling the system that you want to run the command as the "root" user, which has access to all system resources. However, it is important to use caution when using "sudo" as running commands with root privileges can potentially harm your system. It is always a good idea to verify that the commands you are running with "sudo" are safe and necessary.