yuvkineco: 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/yuvkineco - from package: mjpegtools

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

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