oarnodecheckquery: 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/bin/oarnodecheckquery - from package: oar-node

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