cacaplay: 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/cacaplay - from package: caca-utils

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

On Debian possible default full paths are:

/usr/bin/cacaplay - from package: caca-utils

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

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