cabal-rpm: 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/cabal-rpm - from package: cabal-rpm

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

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