ucarp: 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/sbin/ucarp - from package: ucarp

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

On Debian possible default full paths are:

/usr/sbin/ucarp - from package: ucarp

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

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