mkoctfile: 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 CentOS possible default full paths are:

/usr/bin/mkoctfile - from package: octave-devel

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/mkoctfile - from package: liboctave-dev

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

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