switchsh: 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/switchsh - from package: switchsh

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

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