Re: HELP! - I've screwed up and now can't access root
From: Tutaepaki (replyto_at_newsgroup.not.me)
Date: 06/26/03
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Date: Thu, 26 Jun 2003 02:33:19 +0000 (UTC)
"sxjcp" <sxjcp@alaska.edu> wrote in news:bddh8i$jdv$1@news.alaska.edu:
> I consider myself an intermediate user on Linux. I can do things very
> well, others not well at all. At my workplace, I've converted a former
> PIII NT machine into a smoking RH9.0 NetWorker client. One of the
> requests that my lead IT asked me to do is to set up this Linux box to
> be SSH enabled to transfer and store critical files. Although it was
> my first time doing so, I was able to impliment SSH, and then started
> looking for addtional security. So I downloaded the RH Linux Security
> Guide from RH's site.
>
> I was walking through the guide, and started working on root access. I
> wasn't reading ahead. Instead, I was just doing the commands that the
> guide instructed.
>
> First I changed the root shell in my /etc/passwd file from /bin/bash
> to /sbin/nologin.
>
> Second I disabled root access via any console device (tty) by creating
> an empty /etc/securetty file.
>
> Third I disabled root SSH logins by editing the /etc/ssh/sshd_config
> to set the PermitRootLogin to no.
>
> I didn't get as far as using PAM to limit root access services because
> at this point I then rebooted to test a previous security
> implementation to the grub.conf file to enforce pwords when login in
> to command line. I found out that something went wrong. I believe it
> was a bad crypto copy from the /sbin/grub-md5-crypt output, but that's
> not my problem. My problem is this. Because of my root access step
> one, I'm no longer to switch into root mode with su. I then tried to
> implement my commands with sudo. However, I cannot get it to accept my
> root password. FYI, because it was my first time running sudo, I
> didn't do any config on it. I know that my root password still works
> because when I execute any system setting programs, I can successfully
> start it with my root pword. I really want to edit my root shell back
> to /sbin/nologin. What is the correct implimentation of sudo? I've
> been entering the following below:
>
> $ sudo vi /etc/passwd
>
> I wish I were in front of my work workstation, but I'm currently at
> home and can't recall the output from that statement. All I know is
> that I can't get into it. Please can someone help me out here?
>
>
THe password sudo requires is YOUR password, not the root one!
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