logcleaner.php: 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 Debian possible default full paths are:

/usr/share/simplesamlphp/modules/statistics/bin/logcleaner.php - from package: simplesamlphp

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

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