fsmv: 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
/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/fsmv - from package: python-fs

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