#!/bin/bash

DB_BACKUP="/srv/Backup"
DB_HOME="/srv/fb"
BACKUP_CMD="/usr/bin/gbak -B"
USER_PASSWD="-User SYSDBA -Password PASSWORD"
BACKUP_EXT=".bac"
FILE_TIME_STAMP=`date '+%d'` #День месяца

declare -a DB_FILE
DB_FILE[1]="db1.gdb"
DB_FILE[2]="db2.gdb"
DB_FILE[3]="db3.gdb"

for n in 1 2 3
do
    BACKUP_FILE=$DB_BACKUP/${DB_FILE[$n]}_$FILE_TIME_STAMP$BACKUP_EXT
    $BACKUP_CMD $DB_HOME/${DB_FILE[$n]} $USER_PASSWD $BACKUP_FILE
    /bin/gzip $BACKUP_FILE -f
done