fsmkdir: 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/fsmkdir - from package: python-fs

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

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