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Unable to change user password on AWS using `passwd` command
How to run a server on port 80 as a normal user on Linux?how to disable SSH login with password for some users?sudo asks me for passwordLog all commands run by admins on production serversCentOS lost Root AccessHow can I implement ansible with per-host passwords, securely?Cent OS unable to login after passwdHow to sudo another user without passwordsetting up root password in aws linux instanceUnable to change ldap client password(RHEL 7)
I am using Amazon's AWS insances running CentOS. I was trying to create a user with SUDO privilege and then disable the Root login to secure the systems. I have already done the required to bring this into effect but am now stuck with a problem I failed to understand.
When I created a User (say ABC) I did not set a password for it. Instead I use RSA Keys for authentication purpose.
Then I used visudo command and added ABC ALL=(ALL) ALL to the bottom of the file to give sudo privilege to this user.
Then I opened /etc/ssh/sshd_config in vi and turned PermitRootLogin to no and restart sshd. this is to disable root access.
I was expecting this to be it, i.e. disabling root login and having ABC do all the required administrative task. But am badly stuck now.
My Problem is when I login a ABC and try to sudo any command, it is asking for user passsword. This user does not have a password but a RSA Key with it, which i dont think can be used with SUDO.
I tried setting a password for this user using passwd command. Thats does not work either. Am getting following error.
$ passwd
Changing password for user kagzisa.
Changing password for kagzisa
(current) UNIX password:
passwd: Authentication token manipulation error
I am just pressing enter key when it prompts for current password as there is no current password specified.
Now I am stuck as I have got the Root login disabled and am not able to sudo any commands from ABC. I cant loose this system as there are some important process running on it.
Is there a way through which I can fix this. Either by reactivating root or by able to sudo commands?
linux unix centos sudo passwd
bumped to the homepage by Community♦ 3 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
migrated from stackoverflow.com Oct 26 '11 at 14:07
This question came from our site for professional and enthusiast programmers.
add a comment |
I am using Amazon's AWS insances running CentOS. I was trying to create a user with SUDO privilege and then disable the Root login to secure the systems. I have already done the required to bring this into effect but am now stuck with a problem I failed to understand.
When I created a User (say ABC) I did not set a password for it. Instead I use RSA Keys for authentication purpose.
Then I used visudo command and added ABC ALL=(ALL) ALL to the bottom of the file to give sudo privilege to this user.
Then I opened /etc/ssh/sshd_config in vi and turned PermitRootLogin to no and restart sshd. this is to disable root access.
I was expecting this to be it, i.e. disabling root login and having ABC do all the required administrative task. But am badly stuck now.
My Problem is when I login a ABC and try to sudo any command, it is asking for user passsword. This user does not have a password but a RSA Key with it, which i dont think can be used with SUDO.
I tried setting a password for this user using passwd command. Thats does not work either. Am getting following error.
$ passwd
Changing password for user kagzisa.
Changing password for kagzisa
(current) UNIX password:
passwd: Authentication token manipulation error
I am just pressing enter key when it prompts for current password as there is no current password specified.
Now I am stuck as I have got the Root login disabled and am not able to sudo any commands from ABC. I cant loose this system as there are some important process running on it.
Is there a way through which I can fix this. Either by reactivating root or by able to sudo commands?
linux unix centos sudo passwd
bumped to the homepage by Community♦ 3 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
migrated from stackoverflow.com Oct 26 '11 at 14:07
This question came from our site for professional and enthusiast programmers.
I believe this question is for superuser.com
– 4e6
Oct 24 '11 at 8:18
add a comment |
I am using Amazon's AWS insances running CentOS. I was trying to create a user with SUDO privilege and then disable the Root login to secure the systems. I have already done the required to bring this into effect but am now stuck with a problem I failed to understand.
When I created a User (say ABC) I did not set a password for it. Instead I use RSA Keys for authentication purpose.
Then I used visudo command and added ABC ALL=(ALL) ALL to the bottom of the file to give sudo privilege to this user.
Then I opened /etc/ssh/sshd_config in vi and turned PermitRootLogin to no and restart sshd. this is to disable root access.
I was expecting this to be it, i.e. disabling root login and having ABC do all the required administrative task. But am badly stuck now.
My Problem is when I login a ABC and try to sudo any command, it is asking for user passsword. This user does not have a password but a RSA Key with it, which i dont think can be used with SUDO.
I tried setting a password for this user using passwd command. Thats does not work either. Am getting following error.
$ passwd
Changing password for user kagzisa.
Changing password for kagzisa
(current) UNIX password:
passwd: Authentication token manipulation error
I am just pressing enter key when it prompts for current password as there is no current password specified.
Now I am stuck as I have got the Root login disabled and am not able to sudo any commands from ABC. I cant loose this system as there are some important process running on it.
Is there a way through which I can fix this. Either by reactivating root or by able to sudo commands?
linux unix centos sudo passwd
I am using Amazon's AWS insances running CentOS. I was trying to create a user with SUDO privilege and then disable the Root login to secure the systems. I have already done the required to bring this into effect but am now stuck with a problem I failed to understand.
When I created a User (say ABC) I did not set a password for it. Instead I use RSA Keys for authentication purpose.
Then I used visudo command and added ABC ALL=(ALL) ALL to the bottom of the file to give sudo privilege to this user.
Then I opened /etc/ssh/sshd_config in vi and turned PermitRootLogin to no and restart sshd. this is to disable root access.
I was expecting this to be it, i.e. disabling root login and having ABC do all the required administrative task. But am badly stuck now.
My Problem is when I login a ABC and try to sudo any command, it is asking for user passsword. This user does not have a password but a RSA Key with it, which i dont think can be used with SUDO.
I tried setting a password for this user using passwd command. Thats does not work either. Am getting following error.
$ passwd
Changing password for user kagzisa.
Changing password for kagzisa
(current) UNIX password:
passwd: Authentication token manipulation error
I am just pressing enter key when it prompts for current password as there is no current password specified.
Now I am stuck as I have got the Root login disabled and am not able to sudo any commands from ABC. I cant loose this system as there are some important process running on it.
Is there a way through which I can fix this. Either by reactivating root or by able to sudo commands?
linux unix centos sudo passwd
linux unix centos sudo passwd
asked Oct 23 '11 at 10:34
Salman A. Kagzi
bumped to the homepage by Community♦ 3 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 3 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
migrated from stackoverflow.com Oct 26 '11 at 14:07
This question came from our site for professional and enthusiast programmers.
migrated from stackoverflow.com Oct 26 '11 at 14:07
This question came from our site for professional and enthusiast programmers.
I believe this question is for superuser.com
– 4e6
Oct 24 '11 at 8:18
add a comment |
I believe this question is for superuser.com
– 4e6
Oct 24 '11 at 8:18
I believe this question is for superuser.com
– 4e6
Oct 24 '11 at 8:18
I believe this question is for superuser.com
– 4e6
Oct 24 '11 at 8:18
add a comment |
1 Answer
1
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You should probably use NOPASSWORD tag in visudo so it won't ask you for any password.
ABC ALL = NOPASSWD: ALL
answered Oct 26 '11 at 14:27
MichaelMichael
1
add a comment |
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You should probably use NOPASSWORD tag in visudo so it won't ask you for any password.
ABC ALL = NOPASSWD: ALL
answered Oct 26 '11 at 14:27
MichaelMichael
1
add a comment |
You should probably use NOPASSWORD tag in visudo so it won't ask you for any password.
ABC ALL = NOPASSWD: ALL
answered Oct 26 '11 at 14:27
MichaelMichael
1
add a comment |
You should probably use NOPASSWORD tag in visudo so it won't ask you for any password.
ABC ALL = NOPASSWD: ALL
answered Oct 26 '11 at 14:27
MichaelMichael
1
You should probably use NOPASSWORD tag in visudo so it won't ask you for any password.
ABC ALL = NOPASSWD: ALL
answered Oct 26 '11 at 14:27
MichaelMichael
1
answered Oct 26 '11 at 14:27
MichaelMichael
1
answered Oct 26 '11 at 14:27
MichaelMichael
1
answered Oct 26 '11 at 14:27
MichaelMichael
1
1
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I believe this question is for superuser.com
– 4e6
Oct 24 '11 at 8:18