winswitch_stdio_socket: 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_stdio_socket - from package: winswitch

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

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