cgroupfs-mount: 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/cgroupfs-mount - from package: cgroupfs-mount

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

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