dccp: 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/dccp - from package: dcap

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

On Debian possible default full paths are:

/usr/bin/dccp - from package: dcap

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

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