ebwxshell: 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/ebwxshell - from package: eekboek-gui

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

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