pybliotex: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/pybliotex - from package: pybliographer

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