@ -392,6 +392,8 @@ Additional modern abbreviations used include:
\item[sbin]
\item[SELinux] A Linux kernel security module that provides allows administrators to have more control over who can access the system. It attempts to separate the security policy from enforcement of security decisions. It was originally developed by the National Security Agency (NSA) and was released to the open source community in 2000. It was integrated into the upstream Linux kernel in 2003. Information about security is generally contained in \texttt{/etc/sysconfig/selinux}.
\item[shell]
\item[Softlanding Linux System (SLS)] The second Linux distros (after MCC), founded by Peter MacDonald in May 1992. Although touted as an alternative to DOS (its original slogan was ``Gentle Touchdowns for DOS Bailouts'') it was considered buggy by many of its users. It was the first comprehensive Linux distributions in that in addition to the Linux kernel in also included other basic utilities, such as the X Window System (q.v.). It formed the basis of the Slackware distro (q.v.).
@ -447,7 +449,7 @@ Additional modern abbreviations used include:
\item[update] To change software or parts of software to newer versions, in order to add new features, eliminate bugs, or enhance security, or for a combination of those three reasons. In Ubuntu, the \texttt{apt} (\textit{q.v.}) application handles updates.
\item[useradd]
\item[useradd]A command for creating a new user or changing (with the \texttt{-D} option) the defaults for new users. The \texttt{-G} option will allow you to add the user to comma-delimited list of groups upon creation, \texttt{-p} defines an initial password for the account, and \texttt{-U} creates a group with the same name.
