conjugue-UTF-8: 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/conjugue-UTF-8 - from package: brazilian-conjugate

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

Error in other languages:
conjugue-UTF-8: bevel nie gevind nie
conjugue-UTF-8: comandă negăsită
conjugue-UTF-8: comando não encontrado
conjugue-UTF-8: commande introuvable
conjugue-UTF-8: command not found
conjugue-UTF-8: käsku ei ole
conjugue-UTF-8: không tìm thấy lệnh
conjugue-UTF-8: komanda nerasta
conjugue-UTF-8: Kommando nicht gefunden.
conjugue-UTF-8: kommandot finns inte
conjugue-UTF-8: komut yok
conjugue-UTF-8: nie znaleziono polecenia
conjugue-UTF-8: níor aimsíodh an t-ordú
conjugue-UTF-8: no se encontró la orden
conjugue-UTF-8: no s'ha trobat l'ordre
conjugue-UTF-8: opdracht niet gevonden
conjugue-UTF-8: parancs nem található
conjugue-UTF-8: perintah tidak ditemukan
conjugue-UTF-8: príkaz nenájdený
conjugue-UTF-8: příkaz nenalezen
conjugue-UTF-8: команда не найдена
conjugue-UTF-8: командата не е открита
conjugue-UTF-8: 命令找不到
conjugue-UTF-8: コマンドが見つかりません