zemberek-demo: 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/zemberek-demo - from package: zemberek-java-demo

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

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