ucat: 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/ucat - from package: unp

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

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