#!/bin/bash
 
OLD_HIST_DIR="/var/log/user_history/old_logs"
HIST_DIR="/var/log/user_history"
 
MNTH_DEST_DIR="/var/log/user_history/old_logs/$(date +'%m')"
# date +'%m' gives number corresponding to the current month in 01,02,...11,12 fashion
 
mkdir -p "${MNTH_DEST_DIR}"  "${OLD_HIST_DIR}" # This will create the directory if not present

cp -p ${HIST_DIR}/*history ${OLD_HIST_DIR}
 
gzip -9 ${OLD_HIST_DIR}/*history

mv ${OLD_HIST_DIR}/*.gz  ${MNTH_DEST_DIR}