chcpu: 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/chcpu - from package: util-linux-ng

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

On Debian possible default full paths are:

/sbin/chcpu - from package: util-linux

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

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