xcb: 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/xcb - from package: xcb

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

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