copyfs-fversion: 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/copyfs-fversion - from package: copyfs

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