特殊:Badtitle/NS100:UbuntuLTSP/CreateChrootAdminAcct

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{{#if: | {{{2}}} | https://help.ubuntu.com/community/UbuntuLTSP/CreateChrootAdminAcct }}

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This page is specific to Ubuntu versions 8.04 and 9.04

If you find this information applicable to additional versions/releases, please edit this page and modify this header to reflect that. Please also include any necessary modifications for this information to apply to the additional versions.

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NOTE: Please use this page as a reference for other pages instead of simply copying the code.

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Create admin account

By default in Ubuntu (server and chroot filesystems), the 'root' account is locked and users are advised to use 'sudo' to perform administrative tasks. This is a good idea. This page is dedicated to creating an administrative user account in the LTSP client chroot environment. To become root, the adminname user only needs to:

sudo -s -H

• Create an adminname account inside the chroot:
• NOTE: In the visudo step add to end of /etc/sudoers file:

# Members of the sudo group may gain root privileges
%sudo ALL=(ALL) ALL

sudo -s -H
chroot /opt/ltsp/i386
useradd -m adminname -G sudo
passwd adminname
visudo
exit
exit

• Lastly, update the client image to reflect the changes we just made:

sudo ltsp-update-image

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How to 'lock' the account

sudo chroot /opt/ltsp/i386 passwd -l adminname
sudo ltsp-update-image

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How to 'unlock' the account

sudo chroot /opt/ltsp/i386 passwd -u adminname
sudo ltsp-update-image

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Additional security measure

Disable root login by editing sshd_config

sudo vi /opt/ltsp/i386/etc/ssh/sshd_config

Change PermitRootLogin to no:

PermitRootLogin no

Maybe add a security Banner

#Banner /etc/issue.net
Banner /etc/ssh/warning

Then create the warning file:

sudo vi /opt/ltsp/i386/etc/ssh/warning

Something like:

*** WARNING ***
THIS SYSTEM IS RESTRICTED TO AUTHORIZED USERS FOR AUTHORIZED USE ONLY.

Finally again

sudo ltsp-update-image

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