CentOS7.9 : System Backup and Restore

#!/bin/bash

TODAY=`/bin/date +%Y%m%d`
DAY_AGO=`/bin/date --date '10day ago' +%Y%m%d`

HTML_DIR="/var/www/html"

BACKUP_DIR="/var/www/backup/html_bak"
RUN_FLAG="/var/www/backup/html_bak/html_flag"

/bin/mkdir -p ${BACKUP_DIR}
/bin/touch ${RUN_FLAG}

/bin/tar vfcz ${BACKUP_DIR}/html_back_${TODAY}.tar.gz ${HTML_DIR}

/bin/chmod 644 ${BACKUP_DIR}/html_back_${TODAY}.tar.gz

if [ -f ${BACKUP_DIR}/html_back_${DAY_AGO}.tar.gz ];
 then
 /bin/rm -f ${BACKUP_DIR}/html_back_${DAY_AGO}.tar.gz
fi

/bin/rm -f ${RUN_FLAG}

#!/bin/bash

export LANG=ja_JP.eucJP
export PATH="$PATH":/usr/local/mysql/bin
export MYSQL_HOME=/usr/local/mysql
export MYLIB=${MYSQL_HOME}/lib
export MANPATH="${MANPATH}":${MYSQL_HOME}/man
export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}":"${MYLIB}"

MYUSER="root" #MySQL connection user name
MYPASS="xxxxxxxxxxx" #MySQL connection password

TIME_STRING=`/bin/date '+%Y%m%d'`
DAY_AGO=`/bin/date --date '10day ago' +%Y%m%d`

DB_BAK_DIR="/var/www/backup/db_bak"
RUN_FLAG="${DB_BAK_DIR}/db_my_flag"

MYSQL_BACKUP_FILE=${DB_BAK_DIR}/mysql_backup_"${TIME_STRING}".dump

/bin/mkdir -p ${DB_BAK_DIR}
/bin/touch ${RUN_FLAG}

mysqldump -u${MYUSER} -p${MYPASS} --all-databases > ${MYSQL_BACKUP_FILE}
/bin/gzip ${MYSQL_BACKUP_FILE}

if [ -f ${DB_BAK_DIR}/${MT_DB}"${DAY_AGO}".dump.gz ];
then
/bin/rm -f ${DB_BAK_DIR}/${MT_DB}"${DAY_AGO}".dump.gz
fi

if [ -f ${DB_BAK_DIR}/${XOOPS_DB}"${DAY_AGO}".dump.gz ];
then
/bin/rm -f ${DB_BAK_DIR}/${XOOPS_DB}"${DAY_AGO}".dump.gz
fi

if [ -f ${DB_BAK_DIR}/${GEEKLOG_DB}"${DAY_AGO}".dump.gz ];
then
/bin/rm -f ${DB_BAK_DIR}/${GEEKLOG_DB}"${DAY_AGO}".dump.gz
fi

/bin/rm -f ${RUN_FLAG}