diff --git a/Howtonfdump.md b/Howtonfdump.md
index 9fb0f2e6..d062fd68 100644
--- a/Howtonfdump.md
+++ b/Howtonfdump.md
@@ -119,9 +119,9 @@ On installe NfSen **et** nfdump à partir des sources :
 ~~~
 # perl -MCPAN -e 'install Socket6'
 
-# wget https://github.com/phaag/nfdump/archive/v1.6.18.tar.gz
-# tar zxvf v1.6.18.tar.gz
-# cd nfdump-1.6.18
+# wget https://github.com/phaag/nfdump/archive/v1.6.23.tar.gz
+# tar zxvf v1.6.23.tar.gz
+# cd nfdump-1.6.23
 # echo 'AC_CONFIG_MACRO_DIRS([m4])' >> configure.ac
 # apt install libcurl4-gnutls-dev libboost-regex-dev libboost-filesystem-dev libboost-system-dev libbz2-1.0 libbz2-dev libbz2-ocaml libbz2-ocaml-dev byacc libtool m4 automake pkg-config flex librrd-dev make
 # ./autogen.sh
@@ -129,9 +129,9 @@ On installe NfSen **et** nfdump à partir des sources :
 # make
 # make install
 
-$ wget https://sourceforge.net/projects/nfsen/files/stable/nfsen-1.3.8/nfsen-1.3.8.tar.gz/download -O nfsen-1.3.8.tar.gz
-$ tar zxvf nfsen-1.3.8.tar.gz
-$ cd ./nfsen-1.3.8
+# wget https://sourceforge.net/projects/nfsen/files/stable/nfsen-1.3.8/nfsen-1.3.8.tar.gz/download -O nfsen-1.3.8.tar.gz
+# tar zxvf nfsen-1.3.8.tar.gz
+# cd ./nfsen-1.3.8
 # cp etc/nfsen-dist.conf /etc/nfsen.conf
 # vim /etc/nfsen.conf
 # mkdir -p /opt/nfsen/data/nfsen
@@ -139,9 +139,33 @@ $ cd ./nfsen-1.3.8
 # adduser nfsen
 # adduser nfsen www-data
 # chown -R nfsen:www-data /opt/nfsen
+# apt install libmailtools-perl
+# ldconfig
 # ./install.pl /etc/nfsen.conf
-# cd /opt/nfsen/data/nfsen/bin/
-#./nfsen start
+# ln -s /opt/nfsen/data/nfsen/bin/nfsen /etc/init.d/nfsen
+# /etc/init.d/nfsen start
+~~~
+
+On peut créer une unité systemd dans `/etc/systemd/system/nfsen.service`:
+
+~~~
+[Unit]
+Description=NFSen
+After=network.target
+
+[Service]
+ExecStart=/opt/nfsen/data/nfsen/bin/nfsen start
+ExecReload=/bin/kill -HUP $MAINPID
+KillMode=process
+
+[Install]
+WantedBy=multi-user.target
+~~~
+
+Puis on l'active :
+
+~~~
+# systemctl enable nfsen.service
 ~~~
 
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