orte-clean: command not found

Have You tried accessing the binary with the full path?

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/lib/debug/usr/bin/orte-clean - from package: libopenmpi1.6-dbg
/usr/bin/orte-clean - from package: openmpi-bin

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