diff --git a/CHANGELOG.md b/CHANGELOG.md
index a5c1ef7..5ff211f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Fix
 * Leave standart task in peace to be able to have a X session for user's nodes… (see #17).
 * Update doc about Debian distribution name and remove useless entries (oldStable).
+* No longer define zsh as default shell for root.
 
 ## Release 0.4.1
 ### Improvement
diff --git a/README.md b/README.md
index 3b77766..92dfd92 100644
--- a/README.md
+++ b/README.md
@@ -120,7 +120,6 @@ Preseeding provides a way to set answers to questions asked by the Debian-Instal
 * Bootloader :
   * Install Grub on the MBR of the first disk.
 * late_command
-  * Define ZSH as the default shell.
   * Permit root login via SSH with it's password.
   * Download and extract a _latecommand_ archive from [this repository][debian latecommand description].
   * Run the script from this archive.
diff --git a/preseed/debian/jessie/preseed.cfg b/preseed/debian/jessie/preseed.cfg
index 0222826..8ac696f 100644
--- a/preseed/debian/jessie/preseed.cfg
+++ b/preseed/debian/jessie/preseed.cfg
@@ -352,8 +352,8 @@ d-i   cdrom-detect/eject                          boolean false
 #d-i debian-installer/exit/poweroff boolean true
 
 #in-target wget -O /tmp/latecommand.tar.gz "https://wiki.101010.fr/lib/exe/fetch.php?media=documentation:administration_systeme:latecommand.tar.gz" --no-check-certificate ; \
-d-i preseed/late_command string in-target chsh -s /bin/zsh ; \
-umount /dev/sys/lv_free ; lvremove -f /dev/sys/lv_free ; \
+d-i preseed/late_command string in-target umount /dev/sys/lv_free ; \
+lvremove -f /dev/sys/lv_free ; \
 in-target /bin/rmdir /mnt/free ; in-target /bin/sed -i '/lv_free/d' /etc/fstab ; \
 in-target /bin/sed -i 's/without-password/yes/g' /etc/ssh/sshd_config ; \
 in-target /usr/bin/tftp 129.20.203.27 -c get scripts/latecommand.tar.gz /tmp/latecommand.tar.gz ; \
diff --git a/preseed/debian/jessie/preseed_cinnamon.cfg b/preseed/debian/jessie/preseed_cinnamon.cfg
index 2b31ce2..ae5f4bf 100644
--- a/preseed/debian/jessie/preseed_cinnamon.cfg
+++ b/preseed/debian/jessie/preseed_cinnamon.cfg
@@ -343,8 +343,8 @@ d-i   cdrom-detect/eject                          boolean false
 #d-i debian-installer/exit/poweroff boolean true
 
 #in-target wget -O /tmp/latecommand.tar.gz "https://wiki.101010.fr/lib/exe/fetch.php?media=documentation:administration_systeme:latecommand.tar.gz" --no-check-certificate ; \
-d-i preseed/late_command string in-target chsh -s /bin/zsh ; \
-umount /dev/sys/lv_free ; lvremove -f /dev/sys/lv_free ; \
+d-i preseed/late_command string in-target umount /dev/sys/lv_free ; \
+lvremove -f /dev/sys/lv_free ; \
 in-target /bin/rmdir /mnt/free ; in-target /bin/sed -i '/lv_free/d' /etc/fstab ; \
 in-target /bin/sed -i 's/without-password/yes/g' /etc/ssh/sshd_config ; \
 in-target /usr/bin/tftp 129.20.203.27 -c get scripts/latecommand.tar.gz /tmp/latecommand.tar.gz ; \
diff --git a/preseed/debian/jessie/preseed_gnome.cfg b/preseed/debian/jessie/preseed_gnome.cfg
index 9a0cc99..caa7710 100644
--- a/preseed/debian/jessie/preseed_gnome.cfg
+++ b/preseed/debian/jessie/preseed_gnome.cfg
@@ -343,8 +343,8 @@ d-i   cdrom-detect/eject                          boolean false
 #d-i debian-installer/exit/poweroff boolean true
 
 #in-target wget -O /tmp/latecommand.tar.gz "https://wiki.101010.fr/lib/exe/fetch.php?media=documentation:administration_systeme:latecommand.tar.gz" --no-check-certificate ; \
-d-i preseed/late_command string in-target chsh -s /bin/zsh ; \
-umount /dev/sys/lv_free ; lvremove -f /dev/sys/lv_free ; \
+d-i preseed/late_command string in-target umount /dev/sys/lv_free ; \
+lvremove -f /dev/sys/lv_free ; \
 in-target /bin/rmdir /mnt/free ; in-target /bin/sed -i '/lv_free/d' /etc/fstab ; \
 in-target /bin/sed -i 's/without-password/yes/g' /etc/ssh/sshd_config ; \
 in-target /usr/bin/tftp 129.20.203.27 -c get scripts/latecommand.tar.gz /tmp/latecommand.tar.gz ; \
diff --git a/preseed/debian/jessie/preseed_mate.cfg b/preseed/debian/jessie/preseed_mate.cfg
index ff5ca47..04cbcd4 100644
--- a/preseed/debian/jessie/preseed_mate.cfg
+++ b/preseed/debian/jessie/preseed_mate.cfg
@@ -343,8 +343,8 @@ d-i   cdrom-detect/eject                          boolean false
 #d-i debian-installer/exit/poweroff boolean true
 
 #in-target wget -O /tmp/latecommand.tar.gz "https://wiki.101010.fr/lib/exe/fetch.php?media=documentation:administration_systeme:latecommand.tar.gz" --no-check-certificate ; \
-d-i preseed/late_command string in-target chsh -s /bin/zsh ; \
-umount /dev/sys/lv_free ; lvremove -f /dev/sys/lv_free ; \
+d-i preseed/late_command string in-target umount /dev/sys/lv_free ; \
+lvremove -f /dev/sys/lv_free ; \
 in-target /bin/rmdir /mnt/free ; in-target /bin/sed -i '/lv_free/d' /etc/fstab ; \
 in-target /bin/sed -i 's/without-password/yes/g' /etc/ssh/sshd_config ; \
 in-target /usr/bin/tftp 129.20.203.27 -c get scripts/latecommand.tar.gz /tmp/latecommand.tar.gz ; \
diff --git a/preseed/debian/stretch/preseed.cfg b/preseed/debian/stretch/preseed.cfg
index 1ff4868..04e80d1 100644
--- a/preseed/debian/stretch/preseed.cfg
+++ b/preseed/debian/stretch/preseed.cfg
@@ -345,8 +345,8 @@ d-i   cdrom-detect/eject                          boolean false
 #d-i debian-installer/exit/poweroff boolean true
 
 #in-target wget -O /tmp/latecommand.tar.gz "https://wiki.101010.fr/lib/exe/fetch.php?media=documentation:administration_systeme:latecommand.tar.gz" --no-check-certificate ; \
-d-i preseed/late_command string in-target chsh -s /bin/zsh ; \
-umount /dev/sys/lv_free ; lvremove -f /dev/sys/lv_free ; \
+d-i preseed/late_command string in-target umount /dev/sys/lv_free ; \
+lvremove -f /dev/sys/lv_free ; \
 in-target /bin/rmdir /mnt/free ; in-target /bin/sed -i '/lv_free/d' /etc/fstab ; \
 in-target /bin/sed -i 's/\(^\|^\#\)\(PermitRootLogin\).*/\2 yes/g' /etc/ssh/sshd_config ; \
 in-target /usr/bin/tftp 129.20.203.27 -c get scripts/latecommand.tar.gz /tmp/latecommand.tar.gz ; \
diff --git a/preseed/debian/stretch/preseed.cinnamon.uefi.cfg b/preseed/debian/stretch/preseed.cinnamon.uefi.cfg
index 2a9dd30..9d7fb96 100644
--- a/preseed/debian/stretch/preseed.cinnamon.uefi.cfg
+++ b/preseed/debian/stretch/preseed.cinnamon.uefi.cfg
@@ -357,8 +357,8 @@ d-i   cdrom-detect/eject                          boolean false
 #d-i debian-installer/exit/poweroff boolean true
 
 #in-target wget -O /tmp/latecommand.tar.gz "https://wiki.101010.fr/lib/exe/fetch.php?media=documentation:administration_systeme:latecommand.tar.gz" --no-check-certificate ; \
-d-i preseed/late_command string in-target chsh -s /bin/zsh ; \
-umount /dev/sys/lv_free ; lvremove -f /dev/sys/lv_free ; \
+d-i preseed/late_command string in-target umount /dev/sys/lv_free ; \
+lvremove -f /dev/sys/lv_free ; \
 in-target /bin/rmdir /mnt/free ; in-target /bin/sed -i '/lv_free/d' /etc/fstab ; \
 in-target /bin/sed -i 's/.*\(PermitRootLogin\).*/\1 yes/g' /etc/ssh/sshd_config ; \
 in-target /usr/bin/tftp 129.20.203.27 -c get scripts/latecommand.tar.gz /tmp/latecommand.tar.gz ; \
diff --git a/preseed/debian/stretch/preseed_cinnamon.cfg b/preseed/debian/stretch/preseed_cinnamon.cfg
index 67b8dc7..115e03f 100644
--- a/preseed/debian/stretch/preseed_cinnamon.cfg
+++ b/preseed/debian/stretch/preseed_cinnamon.cfg
@@ -333,8 +333,8 @@ d-i   cdrom-detect/eject                          boolean false
 #d-i debian-installer/exit/poweroff boolean true
 
 #in-target wget -O /tmp/latecommand.tar.gz "https://wiki.101010.fr/lib/exe/fetch.php?media=documentation:administration_systeme:latecommand.tar.gz" --no-check-certificate ; \
-d-i preseed/late_command string in-target chsh -s /bin/zsh ; \
-umount /dev/sys/lv_free ; lvremove -f /dev/sys/lv_free ; \
+d-i preseed/late_command string in-target umount /dev/sys/lv_free ; \
+lvremove -f /dev/sys/lv_free ; \
 in-target /bin/rmdir /mnt/free ; in-target /bin/sed -i '/lv_free/d' /etc/fstab ; \
 in-target /bin/sed -i 's/.*\(PermitRootLogin\).*/\1 yes/g' /etc/ssh/sshd_config ; \
 in-target /usr/bin/tftp 129.20.203.27 -c get scripts/latecommand.tar.gz /tmp/latecommand.tar.gz ; \
diff --git a/preseed/debian/stretch/preseed_computenode.cfg b/preseed/debian/stretch/preseed_computenode.cfg
index 0533526..68edf13 100644
--- a/preseed/debian/stretch/preseed_computenode.cfg
+++ b/preseed/debian/stretch/preseed_computenode.cfg
@@ -328,8 +328,8 @@ d-i   cdrom-detect/eject                          boolean false
 #d-i debian-installer/exit/poweroff boolean true
 
 #in-target wget -O /tmp/latecommand.tar.gz "https://wiki.101010.fr/lib/exe/fetch.php?media=documentation:administration_systeme:latecommand.tar.gz" --no-check-certificate ; \
-d-i preseed/late_command string in-target chsh -s /bin/zsh ; \
-umount /dev/sys/lv_free ; lvremove -f /dev/sys/lv_free ; \
+d-i preseed/late_command string in-target umount /dev/sys/lv_free ; \
+lvremove -f /dev/sys/lv_free ; \
 in-target /bin/rmdir /mnt/free ; in-target /bin/sed -i '/lv_free/d' /etc/fstab ; \
 in-target /bin/sed -i 's/\(^\|^\#\)\(PermitRootLogin\).*/\2 yes/g' /etc/ssh/sshd_config ; \
 in-target /usr/bin/tftp 129.20.203.27 -c get scripts/latecommand.tar.gz /tmp/latecommand.tar.gz ; \
diff --git a/preseed/debian/stretch/preseed_gnome.cfg b/preseed/debian/stretch/preseed_gnome.cfg
index 6a467cd..f91f79c 100644
--- a/preseed/debian/stretch/preseed_gnome.cfg
+++ b/preseed/debian/stretch/preseed_gnome.cfg
@@ -333,8 +333,8 @@ d-i   cdrom-detect/eject                          boolean false
 #d-i debian-installer/exit/poweroff boolean true
 
 #in-target wget -O /tmp/latecommand.tar.gz "https://wiki.101010.fr/lib/exe/fetch.php?media=documentation:administration_systeme:latecommand.tar.gz" --no-check-certificate ; \
-d-i preseed/late_command string in-target chsh -s /bin/zsh ; \
-umount /dev/sys/lv_free ; lvremove -f /dev/sys/lv_free ; \
+d-i preseed/late_command string in-target umount /dev/sys/lv_free ; \
+lvremove -f /dev/sys/lv_free ; \
 in-target /bin/rmdir /mnt/free ; in-target /bin/sed -i '/lv_free/d' /etc/fstab ; \
 in-target /bin/sed -i 's/\(^\|^\#\)\(PermitRootLogin\).*/\2 yes/g' /etc/ssh/sshd_config ; \
 in-target /usr/bin/tftp 129.20.203.27 -c get scripts/latecommand.tar.gz /tmp/latecommand.tar.gz ; \
diff --git a/preseed/debian/stretch/preseed_mate.cfg b/preseed/debian/stretch/preseed_mate.cfg
index 73990b1..8767be0 100644
--- a/preseed/debian/stretch/preseed_mate.cfg
+++ b/preseed/debian/stretch/preseed_mate.cfg
@@ -333,8 +333,8 @@ d-i   cdrom-detect/eject                          boolean false
 #d-i debian-installer/exit/poweroff boolean true
 
 #in-target wget -O /tmp/latecommand.tar.gz "https://wiki.101010.fr/lib/exe/fetch.php?media=documentation:administration_systeme:latecommand.tar.gz" --no-check-certificate ; \
-d-i preseed/late_command string in-target chsh -s /bin/zsh ; \
-umount /dev/sys/lv_free ; lvremove -f /dev/sys/lv_free ; \
+d-i preseed/late_command string in-target umount /dev/sys/lv_free ; \
+lvremove -f /dev/sys/lv_free ; \
 in-target /bin/rmdir /mnt/free ; in-target /bin/sed -i '/lv_free/d' /etc/fstab ; \
 in-target /bin/sed -i 's/\(^\|^\#\)\(PermitRootLogin\).*/\2 yes/g' /etc/ssh/sshd_config ; \
 in-target /usr/bin/tftp 129.20.203.27 -c get scripts/latecommand.tar.gz /tmp/latecommand.tar.gz ; \