xdt-commit: 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/xdt-commit - from package: xfce4-dev-tools

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

On Debian possible default full paths are:

/usr/bin/xdt-commit - from package: xfce4-dev-tools

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

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