Swish: 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 - from package: swish

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

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