uustat: command not found

Have You tried accessing the binary with the full path?

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/uustat - from package: uucp

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

On Debian possible default full paths are:

/usr/bin/uustat - from package: uucp

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