texifybison: 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
/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/texifybison - from package: texify

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