hyphen_show: 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/hyphen_show - from package: hyphen-show

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

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