stty: 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:

/bin/stty - from package: coreutils

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

On Debian possible default full paths are:

/bin/stty - from package: coreutils

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

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