release du matin, chagrin

chap/ssh.tex

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+\chapter{ssh}
+\label{ssh}
+
+Secure Shell.
+
+D'après le site \texttt{openssh.org} :
+\textit{OpenSSH is a {\em free} version of the SSH\index{SSH} connectivity
+tools that technical users of the Internet rely on. Users of
+telnet, rlogin, and ftp\index{ftp} may not realize that their password
+is transmitted across the Internet unencrypted, but it
+is. OpenSSH encrypts all traffic (including passwords) to
+effectively eliminate eavesdropping, connection hijacking, and
+other attacks. Additionally, OpenSSH provides secure tunneling
+capabilities and several authentication methods, and supports
+all SSH protocol versions.}
+
+
+
+\section{sshfs}
+\index{sshfs}
+
+D'après la manpage Linux : \textit{SSHFS (Secure SHell FileSystem)
+is a file system for Linux (and other operating systems with a FUSE
+implementation, such as Mac OS X or FreeBSD) capable of operating
+on files on a remote computer using just a secure shell login on the
+remote computer.  On the local computer where the SSHFS is mounted,
+the implementation makes use of the FUSE (Filesystem in Userspace)
+kernel module. The practical effect of this is that the end user can
+seamlessly interact with remote files being securely served over SSH
+just as if they were local files on his/her computer. On the remote
+computer the SFTP subsystem of SSH is used.}
+
+Hélas, ça ne marche pas trop bien depuis un
+OpenBSD\index{OpenBSD}\footnote{OpenBSD 5.5 sur sparc64} :
+
+\begin{verbatim}
+~ $ uname -a
+OpenBSD vierge.thsf.net 5.5 GENERIC#159 sparc64
+~ $ sshfs tth@10.20.0.23:/tvbruits 23/
+fuse_mount: Permission denied
+\end{verbatim}
+
+Grace à \texttt{<semarie>}\footnote{du  Groupuscule des Contributeurs
+d'Unix}\index{gcu} : pour un montage en
+tant que yuser il faut deux choses :
+les bons droits sur \texttt{/dev/fuse*} et un
+\texttt{sysctl kern.usermount=1} bien senti.
+
+La semaine prochaine, nous verrons le \textit{mapping} entre les
+UID\index{UID} locaux et distants.
+
+
+