diff --git a/infra/borgmatic.md b/infra/borgmatic.md
index e884273..592027e 100644
--- a/infra/borgmatic.md
+++ b/infra/borgmatic.md
@@ -3,6 +3,86 @@
 Borgmatic is used to manage backups.
 
 
+```
+apt-get install borgmatic
+```
+
+Generate default Borgmatic configuration:
+```
+generate-borgmatic-config
+```
+
+Create a file containing excludes `/etc/borgmatic/excludes`:
+```
+pp:usr/bin/
+pp:usr/lib/
+pp:usr/sbin/
+pp:usr/share/
+pp:var/cache/
+fm:*/.gvfs
+fm:*/.thumbnails
+fm:*/.bkl-thumbnails
+fm:*/Cache
+fm:*/.cache
+fm:*/cache
+fm:*/cache2
+fm:*/.davfs2
+fm:*/.local/share/Trash
+fm:*/VCache
+fm:*/lost+found
+fm:*/Sauvegardes
+fm:*/kvm/images/*
+fm:*/kvm/ISO/*
+```
+Documentation about pattern: https://borgbackup.readthedocs.io/en/stable/usage/help.html?highlight=pattern
+
+Modify the Borgmatic configuration `/etc/borgmatic/config.yaml`:
+```
+location:
+    source_directories:
+        - /etc
+        - /home
+        - /opt
+        - /root
+        - /srv
+        - /usr
+        - /var
+
+    repositories:
+        - backuplogin@backupmachine:/path/to/backup/Borg.repo
+
+    exclude_from:
+        - /etc/borgmatic/excludes
+
+storage:
+     ssh_command: ssh -p XXXXX
+     # archive_name_format: '{fqdn}-{now:%Y-%m-%dT%H:%M}'
+     archive_name_format: '{fqdn}-{now:%Y%m%d}'
+
+retention:
+     prefix: '{fqdn}-'
+
+output:
+    color: false
+
+```
+
+Check the Borgmatic configuration file:
+```
+validate-borgmatic-config
+```
+
+Define the borgbackup machine in `/etc/hosts`:
+```
+xxx.xxx.xxx.xxx backupmachine
+```
+
+Create local SSH keys:
+```
+ssh-keygen -o -a 100 -t rsa -b 5120 -C "root@fooland.fr"
+```
+
+
 ## SSh timeout
 
 Sometimes, there is broken pipe with ssh. Add the following to the `~/.ssh/config` file on the client: