cleanup_digikamdb: 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/bin/cleanup_digikamdb - from package: digikam

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

On Debian possible default full paths are:

/usr/bin/cleanup_digikamdb - from package: digikam

You may install the required package with command apt-get install {package}

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