water: 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/water - from package: emboss

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

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