bscan.postgresql: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/sbin/bscan.postgresql - from package: bacula-storage-postgresql

You may install the required package with command yum install {package}

Error in other languages:
bscan.postgresql: bevel nie gevind nie
bscan.postgresql: comandă negăsită
bscan.postgresql: comando não encontrado
bscan.postgresql: commande introuvable
bscan.postgresql: command not found
bscan.postgresql: käsku ei ole
bscan.postgresql: không tìm thấy lệnh
bscan.postgresql: komanda nerasta
bscan.postgresql: Kommando nicht gefunden.
bscan.postgresql: kommandot finns inte
bscan.postgresql: komut yok
bscan.postgresql: nie znaleziono polecenia
bscan.postgresql: níor aimsíodh an t-ordú
bscan.postgresql: no se encontró la orden
bscan.postgresql: no s'ha trobat l'ordre
bscan.postgresql: opdracht niet gevonden
bscan.postgresql: parancs nem található
bscan.postgresql: perintah tidak ditemukan
bscan.postgresql: príkaz nenájdený
bscan.postgresql: příkaz nenalezen
bscan.postgresql: команда не найдена
bscan.postgresql: командата не е открита
bscan.postgresql: 命令找不到
bscan.postgresql: コマンドが見つかりません