쉘 오류 좀 봐주세요..ㅠㅠ;

백업 쉘을 하나 만들었는데요.. 백업이 안되고 다음과 같은 메세지가 나옵니다..
어찌된 일인지???

tput clear
tput -T vt100 csr 16 23
trap 'tput clear;exit;' 1 2 3 9 15

#! /usr/bin/bash
REAL_IP4CAT_PATH="/home/real_service/"
REAL_IPOS_PATH="/home/product/"
TEST_IP4CAT_PATH="/home/service/"
TEST_IPOS_PATH="/home/pos_server/"
day=`date '+%a'`
curr_date_time=`date '+%y년%m월%d일%H시%M분%S초'`
curr_time=`date '+%d일%H시%M분%S초'`
yesterday=$(date -d '1 day ago' +%Y%m%d)
# echo $yesterday;read aa;

cd ${TEST_IPOS_PATH}
df /home ;
echo "Press the Enter"
real aa;
sleep 1;
curr_time=`date '+%d일%H시%M분%S초'`
echo " 작업을 시작합니다. [${curr_time}]"
tar cvfz pos_server_${yesterday}.tar.gz /home/pos_server/
ls -ltr *${yesterdat}.tar.gz
curr_time=`date '+%d일%H시%M분%S초'`
echo " 작업이 종료되었습니다. [${curr_time}]"
read aa;
;;

에러 메세지..

Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda3 26217028 2431120 22454120 10% /
Press the Enter
./backup01.sh: line 98: real: command not found
작업을 시작합니다. [23일22시10분33초]
tar (child): pos_server_20040222.tar.gz: Cannot open: Permission denied
tar (child): Error is not recoverable: exiting now
tar: Removing leading `/' from member names
home/pos_server/
home/pos_server/logs/
home/pos_server/cat_ipos/
home/pos_server/pid/
home/pos_server/skcpos/
home/pos_server/skcpos/040322.log
home/pos_server/src/
home/pos_server/src/040322.log
./backup01.sh: line 117: 8674 Broken pipe
tar cvfz pos_server_${yesterday}.tar.gz /home/pos_server/
ls: *.tar.gz: No such file or directory