add: rm expired file shell script

misc/rmexpfiles.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# rm expired file with filename like *20231028111213.zip"
+
+filepath=$1
+duration=$2
+
+find $filepath -maxdepth 1 -type f -name "*[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]*" -printf "%f\n" | while read filename; do
+    datestr=$(echo "$filename" | grep -oE '[0-9]{8}')
+    filedate=$(date -d "$datestr" +%s)
+    sevendaysago=$(date -d "$duration days ago' +%s)
+    if [ "$filedate" -lt "$sevendaysago" ]; then
+        rm -f "$filepath/$filename"
+        echo "rm file: $filename"
+    fi
+done