dpkg-deb: 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/dpkg-deb - from package: dpkg

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

On Debian possible default full paths are:

/usr/bin/dpkg-deb - from package: dpkg

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

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