subcommander: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/subcommander - from package: subcommander

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