我对这个问题的看法是:

如果您需要写入/替换文件:

echo "some text" | sudo tee /path/to/file

如果你需要追加到文件:

echo "some text" | sudo tee -a /path/to/file

让sudo运行一个shell，像这样:

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

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';

这个主题还有另一个变体:

sudo bash <<EOF
ls -hal /root/ > /root/test.out
EOF

或者当然:

echo 'ls -hal /root/ > /root/test.out' | sudo bash

它们有一个(微小的)优势，即您不需要记住sudo或sh/bash的任何参数

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。

我自己发现的一个把戏

sudo ls -hal /root/ | sudo dd of=/root/test.out