默认情况下, STDERR 文件描述符会和 STDOUT 文件描述符指向同样的地方(尽管分配给它们的文件描述符值不同)。也就是说,默认情况下,错误消息也会输出到显示器输出中。 但从上面的例子可以看出, STDERR 并不会随着 STDOUT 的重定向而发生改变。使用脚本时,你常常会想改变这种行为,尤其是当你希望将错误消息保存到日...
echo -e "\e[42;31m --- Redirect stdout and stderr to exclusive files ! ---\e[0m"; cat a* 2>stderr.txt 1>stdout.txt; echo -e "\e[1;32m'cat a* 2>stderr.txt 1>stdout.txt' executed and return value is: $? .\e[0m"; echo -e "\e[1;32mContents of stderr.txt is:...
Bash has no shorthand syntax that allows piping only StdErr to a second command, which would be needed here in combination with tee again to complete the table. If you really need something like that, please look at "How to pipe stderr, and not stdout?" on Stack Overflow for some ways...
Bash has no shorthand syntax that allows piping only StdErr to a second command, which would be needed here in combination with tee again to complete the table. If you really need something like that, please look at "How to pipe stderr, and not stdout?" on Stack Overflow for some ways...
B.>/dev/null 2>&1 also can write as 1>/dev/null 2>&1 - stdout redirect to /dev/null (no stdout) ,and redirect stderr to stdout (stderr gone as well) . end up it turns both stderr and stdout off C.a little practice may help to undstand above . #ls /usr /nothing #ls /...
However, since it is redirecting Stdin to file, I do not get this prompt ("Enter 1 or 0 ") on Terminal as I am hoping to get. How can I redirect Stderr & Stdout to file but receive Stdin from Terminal? Thanks.linux bashShare...
1.4 Linux Shell 分别重定向标准输出 stdin 与标准错误 stderr 到指定的文件: echo-e"\e[42;31m --- Redirect stdout and stderr to exclusive files ! ---\e[0m"; cata*2>stderr.txt 1>stdout.txt; echo-e"\e[1;32m'cat a* 2>stderr.txt 1>stdout.txt' executed and return value is: $...
从系统编程的角度来理解，输出重定向"command > file"就是：command命令输出数据，向stdout或stderr输出（write）数据，Linux Shell把这些数据重新定向（open）输出（write）到file文件中。也就是说：输出重定向就是对stdout或stderr进行重定向。而输入重定向“command < file”，则是把Linux Shell把文件打开（open）...
Before you flag this post as a duplicate (Shell: redirect stdout to /dev/null and stderr to stdout, or How to pipe stderr, and not stdout?, or IO Redirection - Swapping stdout and stderr) please give me a chance. So, I want something like this:...
首先,我们将stdout重定向到ls-output.txt文件,然后用2>&1的符号将文件描述符2stderr重定向到文件描述符1stdout中。 需要注意重定向的顺序,重定向stderr必须总是在重定向stdout之后发生。 最近版本的bash提供了第二种方法,该方法让执行这种组合重定向更精简。