revpath: 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/revpath - from package: imake

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

On Debian possible default full paths are:

/usr/bin/revpath - from package: xutils-dev

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

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