oarcp: 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/bin/oarcp - from package: oar-common

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

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