etex: 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/etex - from package: texlive

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

On Debian possible default full paths are:

/usr/bin/etex - from package: texlive-binaries

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

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