无法实现RMAN脚本（备份）

Question

我一直在尝试通过使用以下脚本来备份数据库。 但是它无法完成（完整）备份。

它只是启动备份，但在特定位置看不到它。

==========================================================
SCRIPT
==========================================================

#!/bin/sh

rman_bkp()

{

# RMAN Backup

echo "test "$2 $1"

echo "Backup in progres.."

{

rman << ZZ

connect target /

run 

{

configure default device type to disk;

configure device type disk parallelism 4;

configure device type disk backup type to compressed backupset;

configure controlfile autobackup format for device type disk to '$1/%F.ctl';

allocate channel c1 device type disk format '$1/d_%s_%p_%T' MAXPIECESIZE 10G;

allocate channel c2 device type disk format '$1/d_%s_%p_%T' MAXPIECESIZE 10G;

allocate channel c3 device type disk format '$1/d_%s_%p_%T' MAXPIECESIZE 10G;

allocate channel c4 device type disk format '$1/d_%s_%p_%T' MAXPIECESIZE 10G;

allocate channel c5 device type disk format '$1/d_%s_%p_%T' MAXPIECESIZE 10G;


backup as compressed backupset full database;

backup current controlfile;

BACKUP ARCHIVELOG ALL DELETE INPUT;

}

crosscheck backup;

delete noprompt obselete;

delete noprompt expired backup;

ZZ

} > $2
}

backup()

{

echo

BKPDIR="/u01/apex/APEXDB/BACKUPS/$BKP_TYPE"

LOGFILE="/u01/apex/APEXDB/BACKUPS/logs/RMAN_${BKP_TYPE}_$DATE.log"

echo $BKPDIR

rman_bkp $BKPDIR $LOGFILE

}

echo

echo "Initiating Backup at "`date`

echo

DATE=`date +%d%m%I%M`

echo "Initiating Apex Database backup"

BKP_TYPE="FULL_DB"

backup $BKP_TYPE

echo

echo "Completed Backup at "`date`

echo





============================================================
ERROR
============================================================
sh rman_backup.sh

Initiating Backup at Fri Feb 1 11:36:09 IST 2019

Initiating Apex Database backup

/u01/apex/APEXDB/BACKUPS/FULL_DB
test /u01/apex/APEXDB/BACKUPS/logs/RMAN_FULL_DB_01021136.log /u01/apex/APEXDB/BACKUPS/FULL_DB
Backup in progres..
rman_backup.sh: line 9: rman: command not found

Completed Backup at Fri Feb 1 11:36:09 IST 2019

如果能对脚本以及错误及其解决方案进行正确的解释，我将不胜感激。