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Why does Sudo redirect not work in Linux?
Your command does not work because the redirection is performed by your shell which does not have the permission to write to /root/test.out. The redirection of the output is not performed by sudo. Create a script with your commands and run that script with sudo:
Why is my sudo command not working with my shell?
The issue is that it’s your shell that handles redirection; it’s trying to open the file with your permissions not those of the process you’re running under sudo. should work. The problem is that > and >> are handled by your shell, not by the “sudoed” command, so the permissions are your ones, not the ones of the user you are “sudoing” into.
How to redirect output to a location in Linux?
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 ). Thanks go to Jd, Adam J. Forster and Johnathan for the second, third and fourth solutions.
How to solve ” permission denied ” when using sudo with?
So, breaking everything into bits, here what is happening*: shell invokes sudo echo “options drm_kms_helper poll=N”, which executes sudo command with echo “options drm_kms_helper poll=N” command line
How to redirect a stdout to a file?
An option would be to use sudo and eval the code properly in a one-liner: A better approach, allowing finer-grained permission in sudoers file, would be to use a combination of sudo and tee (aka pipe fitting). The tee utility copies standard input to standard output, making a copy in zero or more files.
Why does Sudo Sudo fail in Windows 10?
It gets “permission denied” error. For the ways to fix this see @shantanu answer. (*) – while the above sequence helps to understand why the command fails, in reality things happen somewhat out-of-order: the original shell notices the redirection and tries to open the file for writing before invoking the sudo command.
Is the ECHO command the same as Sudo?
Thus, the echo command you usually run and the echo command you run with sudo are probably two different, but similar commands. – kojiro Dec 19 ’12 at 13:48 If that is the case, why did the answers to this question suggest echo? askubuntu.com/questions/840431/… – Harsha Feb 26 ’17 at 13:12
How can I wrap Sudo commands in a script?
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: This is especially useful for one off compound commands. For example: They have the (tiny) advantage that you don’t need to remember any arguments to sudo or sh / bash
Which is the best way to bypass Sudo?
The usual ways of bypassing this are: 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: This is especially useful for one off compound commands.