uucp: 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/uucp - from package: uucp

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

On Debian possible default full paths are:

/usr/bin/uucp - from package: uucp

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

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