bib2ris: 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/bib2ris - from package: refdb-clients

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

Error in other languages:
bib2ris: bevel nie gevind nie
bib2ris: comandă negăsită
bib2ris: comando não encontrado
bib2ris: commande introuvable
bib2ris: command not found
bib2ris: käsku ei ole
bib2ris: không tìm thấy lệnh
bib2ris: komanda nerasta
bib2ris: Kommando nicht gefunden.
bib2ris: kommandot finns inte
bib2ris: komut yok
bib2ris: nie znaleziono polecenia
bib2ris: níor aimsíodh an t-ordú
bib2ris: no se encontró la orden
bib2ris: no s'ha trobat l'ordre
bib2ris: opdracht niet gevonden
bib2ris: parancs nem található
bib2ris: perintah tidak ditemukan
bib2ris: príkaz nenájdený
bib2ris: příkaz nenalezen
bib2ris: команда не найдена
bib2ris: командата не е открита
bib2ris: 命令找不到
bib2ris: コマンドが見つかりません