webdis: 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/webdis - from package: webdis

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

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