cnee: 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:

/usr/bin/cnee - from package: cnee

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

On Debian possible default full paths are:

/usr/bin/cnee - from package: cnee

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

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