cfdisk: 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:

/sbin/cfdisk - from package: util-linux-ng

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

On Debian possible default full paths are:

/sbin/cfdisk - from package: util-linux

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

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