makembindex: 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/makembindex - from package: ncbi-blast+

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

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