平均吞吐量的统计信息和复制的字节印总量被打印到标准错误输出设备。
Statistics of average throughput and the total amount of bytes copied are printed to the standard error output.
这是事实。虽然你总是可以重定向标准输出和标准错误输出，没有什么比命令行错误消息好。
That's true. Although you can always redirect stderr and stdout, nothing beats a good command line error message.
远程执行还模拟客户端主机的标准输入、输出和错误。
Remote execution also emulates the standard input, output, and error of the client host.
通过使用子外壳，可以对整个块（而不是单个命令）的标准和错误输出进行集体重定向。
Using the subshell, you can collectively redirect their standard and error output for the entire block instead of for each individual command.
如果希望将错误或标准输出组合为单个文件，请使用编号重定向(请参见清单4)。
If you want to combine error and standard output into a single file, use numbered redirection (see Listing 4).
有一点不是很重要但却很有帮助，初始打开每个应用程序时，都具有三个文件描述符，从0到2，分别表示标准输入、输出和错误流。
As a bit of helpful trivia, each application is initially opened with three file descriptors, 0 through 2, for the standard input, output, and error streams, respectively.
不怀好意的攻击者可能启动一个程序而只是对它的标准输入、标准输出或者标准错误做一些奇怪的事情。
Sneaky attackers may start a program but do strange things to its standard input, standard output, or standard error.
因为您对标准输出和错误进行了重定向，所以您甚至可以为整个过程生成日志。
Because you redirected the standard output and error, you can even generate a log of the whole process.
Shell重定向可以方便地将标准程序输出、程序错误消息或者这两者捕获到文本文件。
Shell redirection can be handy in capturing standard program output, error messages from a program, or both to text files.
即使找不到文件，它也不会向标准输出返回错误。
It will not return an error to standard output if the file is not found. One way to test the return of the command is to use substitution, like shown in Listing 8.
在这个例子里，侦听器(SuggestionListener)只是在接收到SpellCheckEvent事件时，向标准输出写出拼写错误和建议列表。
In this case, the listener (SuggestionListener) simply writes any misspellings and a list of Suggestions to standard output whenever it receives a SpellCheckEvent.
bashshell允许重定向Linux或UNIX系统上的标准输入、标准输出和标准错误。
The bash shell lets you redirect standard input, standard output, and standard error on a Linux or UNIX system.
在命令管道中作为组件工作(通过读取标准输入或文件名参数，以及写至标准输出和标准错误)。
Working as a component in a pipeline of commands (by reading either standard input or a filename argument, and writing to standard output and standard error).
在运行这个命令时，您将输出发送到两个日志文件，一个用于标准输出，另一个用于标准错误。
When running the commands, you send the output to a couple of log files, one for standard output and the other for standard error.
您可以将php中的相同通道分别用于输入、标准输出和输出到错误通道。
You can use the same channels in PHP for input, standard output, and output to the error channel, respectively.
这是SSH的一个突出的优点，远程计算机重定向到相同的位置(标准输出、标准错误)，所以您可以在本地进行重定向，同时保持输出结果的含义。
This highlights one of the benefits of ssh-the remote machine redirects to the same location (standard output, standard error), so you can redirect locally while retaining the meaning of the output.
但其他的一些命令则使用标准输出和标准错误，并按顺序显示处理过程和错误消息。
But others use standard out and standard error to show progress and error messages, in that order.
标准C库（因而，每个UNIX程序）定义了三种标准流：输入、输出和错误。
The standard C library (and thus, every UNIX program) defined three standard streams: input, output, and error.
指定TraceFile记录文件.如果不指定，所有的记录输出将会加入到 stderr标准错误之中
specify a trace file. If you don't, all tracing output will go to
stderr是标准错误流，显示命令中的错误输出。
stderr is the standard error stream, which displays error output from commands.
让标准错误流写入到multilog进程的管道，这个管道已经连接到了标准输出流。
Makes the standard error stream write to the pipe to the multilog process that is already connected to the standard output stream.
selpg将第10页到第20页写至标准输出，标准输出被丢弃；错误消息在屏幕出现。
Selpg writes pages 10 to 20 to its stdout, which is thrown away; error messages appear on the screen.
当发生活动时，inetd 把入站请求映射到标准输入 (stdin)、标准输出 (stdout)和标准错误 (stderr)，并启动适当的守护进程。
When activity occurs, inetd maps the incoming request to standard input (stdin), standout output (stdout), and standard error (stderr) and launches the proper daemon.
您无法从输出中看到的一个细节是，perror() 将其消息写入标准错误通道 (stderr)；清单1中的printf()调用将写入标准输出通道 (stdout)。
One detail you can't see from the output is that perror() writes its message to the standard error channel (stderr); the printf() call in Listing 1 is writing to the standard output channel (stdout).
实际上，您仍然可以对标准错误使用重定向或管道命令，但不能对标准输出使用，因为没有任何标准输出—正在内部使用popen函数由管道将它输送至lp进程。
Actually, you can still redirect or pipe stderr, but not stdout, since there will not be any standard output — it's being internally piped to the lp process using the popen function.
PrintStream类中定义了常见的、分别用于写入标准输出和标准错误的 System.out 和 System.err对象。
The PrintStream class contains the definition of the common System.out and System.err objects for writing to standard output and standard error, respectively.
在标准输出已被重定向至其它源，而您希望在同一命令行上将标准错误也写至同一目的地时，该特性就非常有用。
But this feature is useful when stdout has already been redirected to another source, on the same command line, and you want stderr to go to the same destination. For example.
同时，selpg进程在后台运行，并且标准输出和标准错误都被重定向至文件。
Meanwhile, the selpg process runs in the background, with stdout and stderr both redirected to files.
如果想要消除这些消息，可以重定向ij工具的标准输出和标准错误。
If you want to eliminate those, you can redirect the ij tool's standard output and standard error. For example, if you're working in the Bash shell, you can do this with.
默认情况下，标准输入从键盘读取，同时标准输出和标准错误会打印到屏幕。
By default, standard input is read from the keyboard, while standard output and standard error are printed to the screen.
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