automake-1.6: 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 CentOS possible default full paths are:

/usr/bin/automake-1.6 - from package: automake16

You may install the required package with command yum install {package}
Error in other languages:
automake-1.6: bevel nie gevind nie
automake-1.6: comandă negăsită
automake-1.6: comando não encontrado
automake-1.6: commande introuvable
automake-1.6: command not found
automake-1.6: käsku ei ole
automake-1.6: không tìm thấy lệnh
automake-1.6: komanda nerasta
automake-1.6: Kommando nicht gefunden.
automake-1.6: kommandot finns inte
automake-1.6: komut yok
automake-1.6: nie znaleziono polecenia
automake-1.6: níor aimsíodh an t-ordú
automake-1.6: no se encontró la orden
automake-1.6: no s'ha trobat l'ordre
automake-1.6: opdracht niet gevonden
automake-1.6: parancs nem található
automake-1.6: perintah tidak ditemukan
automake-1.6: príkaz nenájdený
automake-1.6: příkaz nenalezen
automake-1.6: команда не найдена
automake-1.6: командата не е открита
automake-1.6: 命令找不到
automake-1.6: コマンドが見つかりません