esdcat: command not found

Have You tried accessing the binary with the full path?

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/esdcat - from package: esound-tools

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