revfix: 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 Debian possible default full paths are:

/usr/bin/revfix - from package: argyll

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

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