How to Reset Root Password in CentOS Linux 7 (Core)

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Hello Everyone, In this tutorial, Let Us Reset Root Password & Forgetter… To Fix Broken Sudo....... Errors that you are getting.......... Error 1:- you may notice an error saying you're not in the sudoers file and the incident is going to be reported. Error 2:- sorry user usuario is not allowed to execute '/usr/bin/passwd root' as root on. Error 3:- Give root password for maintenance (or type Control-D to continue) SOLVING ERROR 3 BY BELOW STEP FOLLOW Step1 :- fsck (First You need to Check file checking error, if doesn't solve follow below step) Step2 :- mount -t proc proc /proc Step3 :- mount -o remount, rw / or mount -ro remount,rw / Step4 :- passwd vi /etc/default/locale Step5 :- sync reboot Step6 :- reboot or option(above doesn't solve follow below step) Step7 :- mount | grep ' on / ' That command produces something like /dev/sda1 on / type ext4 (rw,errors=remount-ro,commit=0) as the output Step8 :- sudo mount /dev/sda1 /mnt Replace /dev/sda1 with the device name of the partition containing your Ubuntu system's root filesystem, if different. Step9 :- sudo mount /dev/sda1 /mnt Step10 :- passwd root Step11 :- exit Step12 :- sudo umount /mnt Step13 :- exit Step14 :- reboot Cause and symptoms :- the /etc/sudoers file has been altered to no longer allow users in the admin group to escalate privilege the permissions on the /etc/sudoers file are changed to something other than 0440 a user who should not have been has been taken out of the admin group. By above error and cause can be done by following steps..... To Reset Root Passwd step1 :- Restart your server or desktop step2 :- press continue shift untill boot menu show step3 :- select ubuntu generic second option press Enter step4 :- then select root shell press Enter step5 :- type mount -o rw,remount / step6 :- sudo passwd root or passwd assign passwd and then repeat again the same passwd Note :- inplace of root you can set your username or hostname any name that You assign during Installation OR Login. You can also Create NEW USER step7 :- sudo adduser username (Replace USERNAME with your username) Step8 :- sudo passwd username If you don't know your username, you can get a list of users on the system by running: Step9 :- ls /home NOTE :- For Any Clarification Please Below Comment, Like and Share us and help us to spread. ####--------------------------------------------------------------------------------------#### Subscribe :- Website :- Facebook :- Twitter :- Pinterset :- LinkedIn :- Google+ :- Skype Id :- cloud.network1 E-Mail Id :- ####----------------------------------------------------------------------------------------#### Thanking You Hope U Like it........

Published by: Cloud Network
Published at: ۵ years ago
Category: علمی و تکنولوژی