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I changed the root password, using webmin it shows me successfully done.

$ uname -a
Linux .com 2.6.18-194.11.4.el5 #1 SMP Tue Sep 21 05:04:09 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux

$ echo -e "newPassword\nnewPassword" | passwd root

now i am logged in via ssh and trying to sudo -s or sudo - it says Sorry, try again.

Why i cant sudo -s login as root with valid password? or sudo root commands?

EDIT:

> cat /etc/sudoers
/sbin/iwconfig, /sbin/mii-tool
Defaults    requiretty
Defaults    env_reset
Defaults    env_keep = "COLORS DISPLAY HOSTNAME HISTSIZE INPUTRC KDEDIR \
                        LS_COLORS MAIL PS1 PS2 QTDIR USERNAME \
                        LANG LC_ADDRESS LC_CTYPE LC_COLLATE LC_IDENTIFICATION \
                        LC_MEASUREMENT LC_MESSAGES LC_MONETARY LC_NAME LC_NUMERIC \
                        LC_PAPER LC_TELEPHONE LC_TIME LC_ALL LANGUAGE LINGUAS \
                        _XKB_CHARSET XAUTHORITY"
root    ALL=(ALL)   ALL
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1 Answer 1

up vote 2 down vote accepted

you suppose to enter the password of user that you are trying to sudo from and make sure user has proper sudo access in visudo (/etc/sudoers)

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Using WebMin i am logged in as root, i changed the password, then i tried to ssh to the machine as another user, i am logged in, now via ssh trying to sudo - or sudo -s with new password for root but its failing. –  YumYumYum Jun 19 '13 at 23:46
    
Please see EDIT the /etc/sudoers –  YumYumYum Jun 19 '13 at 23:48
1  
what if you try su - –  Raza Jun 19 '13 at 23:51

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