xgc: 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 Debian possible default full paths are:

/usr/bin/xgc - from package: x11-apps

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

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