bibtex.original: 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/bibtex.original - from package: texlive-binaries

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

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