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在这篇文章中,我们将看到变量,它的执行和它在shell脚本中的实现与实际的例子和用法。
Here in this article we will see the variables, its execution and its implementation in shell script.在Linux中,仅需在shell提示符处发出以下命令(确保导航到下载该包的目录)。
In Linux, simply issue the following command at your shell prompt(be sure to navigate to the directory where you downloaded the package to.Shell内置命令就是一个命令或一个函数,从shell中调用,它直接在shell中执行。
A built-in is a command or a function, called from a shell, which is executed directly in the shell itself.例如,在你的笔记本电脑上写一个shell脚本,然后直接在shell中实时运行它。
For example, write a shell script on your laptop, and run it directly from the shell in real time.请注意,这些高级源在SparkShell中不可用,因此基于这些高级数据源的应用程序无法在shell中测试。
Note that these advanced sources are not available in the Spark shell, hence applications based on these advanced sources cannot be tested in the shell.
Could be useful in shell scripting.
This is useful in shell scripts.
In the shell, start your service.
Try this in the Shell.
In Bash Shell Scripting the variables do not need to be declared.
That command also needs to be built into the shell.
In the shell, there is a prompt of three right angle brackets.
You can use in a shell script, for example.
At the Shell> prompt, change to the file system on the CD-ROM.因此,我们在shell脚本中有for和while循环。
As a result, we have for and while loops in the shell scripting.
Furthermore, it can be used interactively to query data from a shell.
And you can use it interactively to query data within the shell.在shell中将脚本的结果连接在一起时,这非常有用。
This can be useful when concatenating the results of scripts together in the shell.在shell中,我们可以使用source命令来实现类似的效果。
In the Bourne shell, the trap built-in can be used to achieve a similar effect.现在,您只需在Shell的任何位置键入tank即可访问Toolkit。
Now, you can just type tank anywhere in a shell to access toolkit.
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