https://dikapediav2.com/wiki/index.php?action=history&feed=atom&title=Shell 2026-05-15T09:06:34Z Revision history for this page on the wiki MediaWiki 1.41.0 https://dikapediav2.com/wiki/index.php?title=Shell&diff=260&oldid=prev 2024-11-14T22:53:28Z

<p>Created page with &quot;====Disable ability to log into the system using a Shell==== Setting a user&#039;s shell to &lt;b&gt;/bin/false&lt;/b&gt; effectively disables their ability to log into the system using a shell. It restricts certain user accounts (like system or service accounts) from gaining shell access, reducing the attack surface. You can set a user&#039;s shell to &lt;b&gt;/bin/false&lt;/b&gt; by modifying the &lt;b&gt;/etc/passwd&lt;/b&gt; file directly or using a command like &lt;b&gt;chsh&lt;/b&gt;. For example: &lt;b&gt;sudo chsh -s /bin/f...&quot;</p> <p><b>New page</b></p><div>====Disable ability to log into the system using a Shell====<br /> <br /> Setting a user&#039;s shell to &lt;b&gt;/bin/false&lt;/b&gt; effectively disables their ability to log into the system using a shell. It restricts certain user accounts (like system or service accounts) from gaining shell access, reducing the attack surface.<br /> <br /> You can set a user&#039;s shell to &lt;b&gt;/bin/false&lt;/b&gt; by modifying the &lt;b&gt;/etc/passwd&lt;/b&gt; file directly or using a command like &lt;b&gt;chsh&lt;/b&gt;. For example: &lt;b&gt;sudo chsh -s /bin/false username&lt;/b&gt;<br /> <br /> [bob@bob-computer ~]$ dzdo chsh -s /bin/false jerry<br /> hanging shell for jerry.<br /> chsh: Warning: &quot;/bin/false&quot; is not listed in /etc/shells.<br /> Shell changed.<br /> <br /> [bob@bob-computer ~]$ cat /etc/passwd | grep jerry<br /> jerry:x:1000:1000::/home/jerry:/bin/false<br /> <br /> Confirmed that I couldn&#039;t even get into the jerry shell with root, if /bin/false is set for jerry:<br /> [root@bob-computer bob]# sudo -i -u jerry<br /> [root@bob-computer bob]# echo $?<br /> 1</div>

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