When I am trying to backup PIVOTAL HAWQ database using shell script. 

**Getting error :**

```
/home/gpadmin/backup_db.sh: line 12: pg_dump: command not found

```

**Input shell script**:backup\_db.sh

```
#!/bin/bash
# Location to place backup.
backup_dir="/home/backup/"
#String to append at the name of the backup files
backup_date=`date +%d-%m-%Y`
#Numbers of days we want to keep copy databases
number_of_days=7
databases=(prod test gpadmin)
for i in ${databases[@]}; do
  if [ "$i" != "template0" ] && [ "$i" != "template1" ]; then
    echo Dumping $i to $backup_dir$i\_$backup_date
    pg_dump $i|gzip > $backup_dir$i\_$backup_date.gz
  fi
done
find $backup_dir -type f -prune -mtime +$number_of_days -exec rm -f {} \;

```

**CRONTAB :**
ENTRY FOR SHELL SCRIPT - \*/5 \* \* \* \* /home/gpadmin/backup\_db.sh > /tmp/bkp.log

When running the shell manually dumping the data. But at the same time not working via crontab which runs every 5 minute.

Any help on it would be much appreciated.