uz: 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/uz - from package: mtools

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

On Debian possible default full paths are:

/usr/bin/uz - from package: mtools

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

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