pyblioconvert: 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/pyblioconvert - from package: pybliographer

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