diff --git a/TipsShell.md b/TipsShell.md
index 4647cf31..351d9e51 100644
--- a/TipsShell.md
+++ b/TipsShell.md
@@ -189,4 +189,13 @@ TMP=$(mktemp)
 #compter dans les sous niveaux
 cat $TMP | (while read line; do num=$(echo $line | awk '{ print $1 }'); path=$(echo $line | awk '{ print $2 }'); echo ${path%/*}; done) | sort | uniq | (while read line; do echo $(grep "$line" $TMP | cut -f1 -d' ' | xargs echo -n | tr -s ' ' '+' | xargs echo | bc -l) $line; done) | sort -n | tee $RESULT_FILE
 rm $TMP
-~~~
\ No newline at end of file
+~~~
+
+## Supprimer des vieux fichiers
+
+ - + vieux de 30 jours en modification :
+
+~~~{.bash}
+$ find DIR/ -type f -mtime +30 -delete
+$ find DIR/ -type f -mtime +30 -exec rm '{}' \;
+~~~