xemacs-script: 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/xemacs-script - from package: xemacs-common

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

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