cgdelete: 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:

/bin/cgdelete - from package: libcgroup

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

On Debian possible default full paths are:

/usr/bin/cgdelete - from package: cgroup-tools

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

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