Corrupt sudoers files ubuntu 18.04

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I installed ubuntu 18.04 on an AWS instance, and accessed it via a putty session as ubuntu (using the AWS generated key).



I wanted to allow password based login, and I modified the ssh_login and sshd_login to allow password based authentication.



Then I screwed up, and manually edited the /etc/sudoers files



sudo vi sudoers


and saved the file. I made a syntax error in sudoers. I am now stuck.



Yes, I should have used pkexec visudo, but I did not. Any idea how to fix this? This is a remote system, so I cannot reboot in debug mode, or use a USB to reboot.







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  • These instructions might enable you to mount and edit /etc/sudoers in another instance. I'm a bit rushed, so I didn't verify that it can do that.
    – Chai T. Rex
    May 24 at 23:06










  • Yes, this will work, but this is the only disk, and I freeze the instance, I will not be able to "re-attach" it, nothing to attach it to
    – EastsideDeveloper
    May 24 at 23:08










  • "I should have used pkexec visudo" ... and you still can.
    – muru
    May 25 at 1:56














up vote
0
down vote

favorite












I installed ubuntu 18.04 on an AWS instance, and accessed it via a putty session as ubuntu (using the AWS generated key).



I wanted to allow password based login, and I modified the ssh_login and sshd_login to allow password based authentication.



Then I screwed up, and manually edited the /etc/sudoers files



sudo vi sudoers


and saved the file. I made a syntax error in sudoers. I am now stuck.



Yes, I should have used pkexec visudo, but I did not. Any idea how to fix this? This is a remote system, so I cannot reboot in debug mode, or use a USB to reboot.







share|improve this question




















  • These instructions might enable you to mount and edit /etc/sudoers in another instance. I'm a bit rushed, so I didn't verify that it can do that.
    – Chai T. Rex
    May 24 at 23:06










  • Yes, this will work, but this is the only disk, and I freeze the instance, I will not be able to "re-attach" it, nothing to attach it to
    – EastsideDeveloper
    May 24 at 23:08










  • "I should have used pkexec visudo" ... and you still can.
    – muru
    May 25 at 1:56












up vote
0
down vote

favorite









up vote
0
down vote

favorite











I installed ubuntu 18.04 on an AWS instance, and accessed it via a putty session as ubuntu (using the AWS generated key).



I wanted to allow password based login, and I modified the ssh_login and sshd_login to allow password based authentication.



Then I screwed up, and manually edited the /etc/sudoers files



sudo vi sudoers


and saved the file. I made a syntax error in sudoers. I am now stuck.



Yes, I should have used pkexec visudo, but I did not. Any idea how to fix this? This is a remote system, so I cannot reboot in debug mode, or use a USB to reboot.







share|improve this question












I installed ubuntu 18.04 on an AWS instance, and accessed it via a putty session as ubuntu (using the AWS generated key).



I wanted to allow password based login, and I modified the ssh_login and sshd_login to allow password based authentication.



Then I screwed up, and manually edited the /etc/sudoers files



sudo vi sudoers


and saved the file. I made a syntax error in sudoers. I am now stuck.



Yes, I should have used pkexec visudo, but I did not. Any idea how to fix this? This is a remote system, so I cannot reboot in debug mode, or use a USB to reboot.









share|improve this question











share|improve this question




share|improve this question










asked May 24 at 23:01









EastsideDeveloper

1279




1279











  • These instructions might enable you to mount and edit /etc/sudoers in another instance. I'm a bit rushed, so I didn't verify that it can do that.
    – Chai T. Rex
    May 24 at 23:06










  • Yes, this will work, but this is the only disk, and I freeze the instance, I will not be able to "re-attach" it, nothing to attach it to
    – EastsideDeveloper
    May 24 at 23:08










  • "I should have used pkexec visudo" ... and you still can.
    – muru
    May 25 at 1:56
















  • These instructions might enable you to mount and edit /etc/sudoers in another instance. I'm a bit rushed, so I didn't verify that it can do that.
    – Chai T. Rex
    May 24 at 23:06










  • Yes, this will work, but this is the only disk, and I freeze the instance, I will not be able to "re-attach" it, nothing to attach it to
    – EastsideDeveloper
    May 24 at 23:08










  • "I should have used pkexec visudo" ... and you still can.
    – muru
    May 25 at 1:56















These instructions might enable you to mount and edit /etc/sudoers in another instance. I'm a bit rushed, so I didn't verify that it can do that.
– Chai T. Rex
May 24 at 23:06




These instructions might enable you to mount and edit /etc/sudoers in another instance. I'm a bit rushed, so I didn't verify that it can do that.
– Chai T. Rex
May 24 at 23:06












Yes, this will work, but this is the only disk, and I freeze the instance, I will not be able to "re-attach" it, nothing to attach it to
– EastsideDeveloper
May 24 at 23:08




Yes, this will work, but this is the only disk, and I freeze the instance, I will not be able to "re-attach" it, nothing to attach it to
– EastsideDeveloper
May 24 at 23:08












"I should have used pkexec visudo" ... and you still can.
– muru
May 25 at 1:56




"I should have used pkexec visudo" ... and you still can.
– muru
May 25 at 1:56















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