http://wiki.define-technology.com/mediawiki-1.35.0/index.php?action=history&feed=atom&title=Redhat7%3AprivilegesRedhat7:privileges - Revision history2026-05-04T22:53:50ZRevision history for this page on the wikiMediaWiki 1.35.0http://wiki.define-technology.com/mediawiki-1.35.0/index.php?title=Redhat7:privileges&diff=6011&oldid=prevK mouza: /* The SU Command */2015-02-23T11:08:35Z<p><span dir="auto"><span class="autocomment">The SU Command</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Given the root prompt, the user becomes the root user and has all privileges of the root user. The root user hbas the authority to change users and settings across the system without requiring a password.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Given the root prompt, the user becomes the root user and has all privileges of the root user. The root user hbas the authority to change users and settings across the system without requiring a password.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Given the level of access available from the root user, such rights <del class="diffchange diffchange-inline">shoudl </del>be restricted to specific users. The simplest way to <del class="diffchange diffchange-inline">achive </del>this is to add those users who should have access to a <del class="diffchange diffchange-inline">speical </del>group called 'wheel', and can be done using the user commands.</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Given the level of access available from the root user, such rights <ins class="diffchange diffchange-inline">should </ins>be restricted to specific users. The simplest way to <ins class="diffchange diffchange-inline">achieve </ins>this is to add those users who should have access to a <ins class="diffchange diffchange-inline">special </ins>group called 'wheel', and can be done using the user commands.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><syntaxhighlight></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><syntaxhighlight></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>usermod -G wheel <username></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>usermod -G wheel <username></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">After you add the desired users to the wheel group, it is advisable to only allow these specific users to use the <tt>su</tt> command. To do this, edit the PAM configuration file for <tt>s</tt>u, <tt>/etc/pam.d/su</tt>. Open this file in a text editor and uncomment the following line by removing the # character:</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"><syntaxhighlight></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">#auth required pam_wheel.so use_uid</ins></div></td></tr>
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</table>K mouzahttp://wiki.define-technology.com/mediawiki-1.35.0/index.php?title=Redhat7:privileges&diff=6010&oldid=prevK mouza: /* The SU Command */2015-02-23T11:06:38Z<p><span dir="auto"><span class="autocomment">The SU Command</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 11:06, 23 February 2015</td>
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<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>usermod -<del class="diffchange diffchange-inline">g </del>wheel <username></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>usermod -<ins class="diffchange diffchange-inline">G </ins>wheel <username></div></td></tr>
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</table>K mouzahttp://wiki.define-technology.com/mediawiki-1.35.0/index.php?title=Redhat7:privileges&diff=5497&oldid=prevMichael: Created page with "== The SU Command == When the SU command is executed by a user they are asked for the root password. Once the password is given they are presented with the root shell. Given..."2015-01-05T16:06:53Z<p>Created page with "== The SU Command == When the SU command is executed by a user they are asked for the root password. Once the password is given they are presented with the root shell. Given..."</p>
<p><b>New page</b></p><div>== The SU Command ==<br />
<br />
When the SU command is executed by a user they are asked for the root password. Once the password is given they are presented with the root shell.<br />
<br />
Given the root prompt, the user becomes the root user and has all privileges of the root user. The root user hbas the authority to change users and settings across the system without requiring a password.<br />
<br />
Given the level of access available from the root user, such rights shoudl be restricted to specific users. The simplest way to achive this is to add those users who should have access to a speical group called 'wheel', and can be done using the user commands.<br />
<br />
<syntaxhighlight><br />
usermod -g wheel <username><br />
</syntaxhighlight></div>Michael