bibcursed: 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/bibcursed - from package: bibcursed

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

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