bash 如何避免创建 nohup.out 以及在这种情况下将生成输出的位置？
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How to avoid creating nohup.out and in this case where the output will be generated?
提问by icm
I am running a matlab script which taking input arguments and output folder is assigned in the function. When I am running nohup like this nohup ./matlabscript.h & then it generates a nohup.out file which is really huge. How do I avoid creating that file? The output folder is assigned, so I am not sure whether an output file needs to be assigned? Thank you
我正在运行一个 matlab 脚本，它接受输入参数并在函数中分配输出文件夹。当我像这样运行 nohup nohup ./matlabscript.h & 然后它会生成一个非常大的 nohup.out 文件。如何避免创建该文件？输出文件夹已分配，所以我不确定是否需要分配输出文件？谢谢
回答by Basile Starynkevitch
As filmorcommented, you could redirectstdoutto some file.
nohup ./script > script.out &
or even redirect both stdoutand stderrto the same file
甚至将stdout和stderr都重定向到同一个文件
nohup ./script > script.out 2>&1 &
or to a different one
或到另一个
nohup ./script > script.out 2> script.err &
To discard an output, redirect it to /dev/null. The data is basically destructed, so no memory is used. See null(4). If you want to discard both outputs use:
要丢弃输出，请将其重定向到/dev/null. 数据基本被破坏，所以不使用内存。请参阅null(4)。如果要丢弃两个输出，请使用：
nohup ./script > /dev/null 2>&1 &
nohup(1)notices when both outputs are redirected, thus doesn't create the nohup.outfile (provided none of the two outputs is a terminal, see isatty(3)).
nohup(1)注意到两个输出何时被重定向，因此不会创建nohup.out文件（假设两个输出都不是终端，请参阅isatty(3)）。
I would also recommend considering using batch(1)e.g. with a here document
batch << EOJ
./script > script.out 2>&1
EOJ
Read the advanced bash scripting guide.
阅读高级 bash 脚本指南。
