Linux 命令输出重定向到文件和终端
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Command output redirect to file and terminal
提问by Satish
I am trying to throw command output to file plus console also. This is because i want to keep record of output in file. I am doing following and it appending to file but not printing lsoutput on terminal.
我也试图将命令输出抛出到文件和控制台。这是因为我想在文件中保留输出记录。我正在执行以下操作并将其附加到文件但不在ls终端上打印输出。
$ls 2>&1 > /tmp/ls.txt
采纳答案by Karoly Horvath
Yes, if you redirect the output, it won't appear on the console. Use tee.
是的，如果您重定向输出，它将不会出现在控制台上。使用tee.
ls 2>&1 | tee /tmp/ls.txt
回答by Farah
In case somebody needs to append the output and not overriding, it is possible to use "-a" or "--append" option of "tee" command :
如果有人需要附加输出而不是覆盖，可以使用“tee”命令的“-a”或“--append”选项：
ls 2>&1 | tee -a /tmp/ls.txt
ls 2>&1 | tee --append /tmp/ls.txt
回答by Serge Rogatch
It is worth mentioning that 2>&1 means that standard error will be redirected too, together with standard output. So
值得一提的是， 2>&1 意味着标准错误也将与标准输出一起重定向。所以
someCommand | tee someFile
gives you just the standard output in the file, but not the standard error: standard error will appear in console only. To get standard error in the file too, you can use
只给你文件中的标准输出，而不是标准错误：标准错误只会出现在控制台中。要在文件中也获得标准错误，您可以使用
someCommand 2>&1 | tee someFile
(source: In the shell, what is " 2>&1 "?). Finally, both the above commands will truncate the file and start clear. If you use a sequence of commands, you may want to get output&error of all of them, one after another. In this case you can use -a flag to "tee" command:
（来源：在 shell 中，什么是“2>&1”？）。最后，上述两个命令都会截断文件并开始清除。如果您使用一系列命令，您可能希望一个接一个地获得所有这些命令的输出和错误。在这种情况下，您可以使用 -a 标志来“tee”命令：
someCommand 2>&1 | tee -a someFile
