oclingo: 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/oclingo - from package: gringo

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