etherape: 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/etherape - from package: etherape

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

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