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What to do if you make a syntax error in sudoers?
There are two options for editing the file: Option 1: Revert the changes you made that created the syntax error. Option 2: Replace the /mnt/etc/sudoers file with a known correct file from the recovery instance by copying the file from the recovery instance. Create a backup of the original file.
When does sudoers do not need a password?
A password is not required if the invoking user is root, if the target user is the same as the invoking user, or if the policy has disabled authentication for the user or com- mand. Unlike su (1), when sudoers requires authentication, it validates the invoking user’s credentials, not the target user’s (or root’s) cre- dentials.
Is there a way to edit / etc / sudoers?
In case your /etc/sudoers is empty or missing something, and you can edit it, then here’s the contents of mine: Good practice: a backup terminal window and run sudo su there. On another termianl run visudo or sudo vim /etc/sudoers.
Why does sudoers use the sudo _ user variable?
If sudo is run by root and the SUDO_USER environment variable is set, the sudoers policy will use this value to determine who the actual user is. This can be used by a user to log commands through sudo even when a root shell has been invoked. It also allows the -e option to remain useful even when invoked via a sudo-run script or program.
Why is Sudo Su not working on Amazon EC2?
I manually edited the sudoers file on my Amazon Elastic Compute Cloud (Amazon EC2 instance). Now I’m receiving a syntax error similar to the following when trying to run sudo su commands or commands that require privileged user access:
When to run visudo on the sudoers file?
Always run visudo to edit the /etc/sudoers file on instances you can connect to. Visudo checks for parse errors as you edit so that any issues introduced into the file are brought to your attention before you save the changes.
Can you edit the sudoers file using Vim?
Note: Don’t manually edit the sudoers file using a text editor such as vi, vim, or nano on a running instance that you can connect to. Always run visudo to edit the /etc/sudoers file on instances you can connect to.
How to edit the sudoers file in Fedora?
is not in the sudoers file. This incident will be reported. I look up how to change the sudoers file, using a command called visudo. However, it appears that this command too also requires access to sudo. sudo visudo is not in the sudoers file.
How to modify an invalid / etc / sudoers file?
Simply reboot your pc, and wait for grub to show. Then press “e” on the “Ubuntu” entry to edit it. Look for a line with “linux = ” or “kernel = ” and simply add an “single” to the end of that line. Then press F10 to boot this temporarily modified boot entry.
Why did sudoers file get messed up in Windows?
So, I’ve messed up my sudoers file in the windows subsystem for linux. I was trying to add something, and the guy of the tutorial said to edit sudoers file with nano/vim, and that’s what I did (later I discovered that you should only edit it with visudo, nice).