makeself: 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/makeself - from package: makeself

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

On Debian possible default full paths are:

/usr/bin/makeself - from package: makeself

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

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