winswitch_ssh_session: 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/winswitch_ssh_session - from package: winswitch

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

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