diff --git a/reveal/shell.html b/reveal/shell.html
index 4810208..4097595 100644
--- a/reveal/shell.html
+++ b/reveal/shell.html
@@ -69,13 +69,14 @@
 </section>
 
 <section>
-ps, kill, pstree
-fg, bg
-diff, patch
-tar, dd
-gzip/gunzip, bzip2/bunzip2, xz/unxz
-mount/umount, man
-mkfs, fsck, tune2fs
+<h2>Shell : système</h2>
+<li>ps, kill, pstree</li>
+<li>fg, bg</li>
+<li>diff, patch</li>
+<li>tar, dd</li>
+<li>gzip/gunzip, bzip2/bunzip2, xz/unxz</li>
+<li>mount/umount, man</li>
+<li>mkfs, fsck, tune2fs</li>
 </section>
 
 <section>
@@ -84,9 +85,7 @@ mkfs, fsck, tune2fs
 <li>cd, cp, mv, rm, touch</li>
 <li>touch, mkdir, mktemp, ln</li>
 <li>sort, wc, uniq, tr</li>
-<li>grep, find, for, while, xargs</li>
 <li>echo, cat, head, tail, read</li>
-<li>if, test, exit, seq, while, for, case</li>
 </ul>
 </section>
 
@@ -97,6 +96,7 @@ alias/unalias
 <section>
 Commandes avancées
 
+<li>grep, find</li>
 /bin/dash zsh
 sed / awk
 xargs
@@ -129,6 +129,8 @@ echo $((1+1))
 ${i.%ext}
 ${i#/home/}
 
+<li>if, test, exit, seq, while, for, case</li>
+
 </section>
 
 <section>
diff --git a/reveal/sysadmin.html b/reveal/sysadmin.html
index 3d423bf..507efbd 100644
--- a/reveal/sysadmin.html
+++ b/reveal/sysadmin.html
@@ -844,11 +844,56 @@ ansible 2.2.1.0
 </section>
 
 <section>
-<h2>ssh</h2>
+<h2>OpenSSH</h2>
+
+- SSH: Secure Shell
+- Outils: 
+  Client: ssh, scp, sftp 
+  Serveur: ssh-add, ssh-agent, ssh-keygen, ssh-keysign, ssh-keyscan, et sftp-server
+- Configuration de sshd_config
+
+Port 22
+Port 2222
+
+PermitRootLogin yes/no/without-password
+
+AllowUsers foo bar baz
+
+Match Address 192.0.2.1,192.0.2.2
+    PasswordAuthentication yes
+Match User foo,bar
+    PasswordAuthentication no
+
+$ ssh-keygen
+$ cat .ssh/id_rsa.pub
+$ vim .ssh/authorized_keys
+$ ssh-agent
+
+scp   fichier-local    identité-distante@hôte-distant:chemin/fichier
+scp   identité-distante@hôte-distant:chemin/fichier   fichier-local
+
 </section>
 
 <section>
 <h2>sauvegardes</h2>
+File-system (totales ou incrémentales)
+
+tar -cpvf
+cpio, pax
+
+dump/restore, partimage
+dd
+
+umount /file-system
+dump 0uf /dev/rst0 /file-system
+
+
+LA solution magique...
+
+rsync -av --delete
+cp -al
+
+EvoBackup : https://forge.evolix.org/projetcs/evobackup
 </section>
 
 <section>