swish-e: 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/swish-e - from package: swish-e

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

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