gnatbind: 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 CentOS possible default full paths are:

/usr/bin/gnatbind - from package: gcc-gnat

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/gnatbind - from package: gnat-4.9

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

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