这是基于tee的答案。为了让事情更简单，我写了一个小脚本(我叫它suwrite)，并把它放在/usr/local/bin/ +x权限:

#! /bin/sh
if [ $# = 0 ] ; then
    echo "USAGE: <command writing to stdout> | suwrite [-a] <output file 1> ..." >&2
    exit 1
fi
for arg in "$@" ; do
    if [ ${arg#/dev/} != ${arg} ] ; then
        echo "Found dangerous argument ‘$arg’. Will exit."
        exit 2
    fi
done
sudo tee "$@" > /dev/null

如代码中的USAGE所示，您所要做的就是将输出输出输送到这个脚本，后面跟着所需的超级用户可访问的文件名，如果需要的话，它将自动提示您输入密码(因为它包含sudo)。

echo test | suwrite /root/test.txt

注意，由于这是tee的一个简单包装器，它也将接受tee的-a选项来追加，并且还支持同时写入多个文件。

echo test2 | suwrite -a /root/test.txt
echo test-multi | suwrite /root/test-a.txt /root/test-b.txt

它也有一些简单的保护，防止写入/dev/设备，这是该页的一个评论中提到的一个问题。

写一个脚本怎么样?

Filename: myscript

#!/bin/sh

/bin/ls -lah /root > /root/test.out

# end script

然后使用sudo运行脚本:

sudo ./myscript

我会这样做:

sudo su -c 'ls -hal /root/ > /root/test.out'

让sudo运行一个shell，像这样:

sudo sh -c "echo foo > ~root/out"

您的命令不起作用，因为重定向是由您的shell执行的，shell没有写入/root/test.out的权限。输出的重定向不是由sudo执行的。

有多种解决方案:

Run a shell with sudo and give the command to it by using the -c option: sudo sh -c 'ls -hal /root/ > /root/test.out' Create a script with your commands and run that script with sudo: #!/bin/sh ls -hal /root/ > /root/test.out Run sudo ls.sh. See Steve Bennett's answer if you don't want to create a temporary file. Launch a shell with sudo -s then run your commands: [nobody@so]$ sudo -s [root@so]# ls -hal /root/ > /root/test.out [root@so]# ^D [nobody@so]$ Use sudo tee (if you have to escape a lot when using the -c option): sudo ls -hal /root/ | sudo tee /root/test.out > /dev/null The redirect to /dev/null is needed to stop tee from outputting to the screen. To append instead of overwriting the output file (>>), use tee -a or tee --append (the last one is specific to GNU coreutils).

感谢Jd, Adam J. Forster和Johnathan的第二，第三和第四个解决方案。

问题是命令在sudo下运行，而重定向在您的用户下运行。这是由shell完成的，对此您几乎无能为力。

sudo command > /some/file.log
`-----v-----'`-------v-------'
   command       redirection

通常绕过这个的方法是:

Wrap the commands in a script which you call under sudo. If the commands and/or log file changes, you can make the script take these as arguments. For example: sudo log_script command /log/file.txt Call a shell and pass the command line as a parameter with -c This is especially useful for one off compound commands. For example: sudo bash -c "{ command1 arg; command2 arg; } > /log/file.txt" Arrange a pipe/subshell with required rights (i.e. sudo) # Read and append to a file cat ./'file1.txt' | sudo tee -a '/log/file.txt' > '/dev/null'; # Store both stdout and stderr streams in a file { command1 arg; command2 arg; } |& sudo tee -a '/log/file.txt' > '/dev/null';