hoc: 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/lib/plan9/bin/hoc - from package: 9base

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

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