gmerlin-record: 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/gmerlin-record - from package: gmerlin

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