cococs: 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/cococs - from package: coco-cs

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

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