mklogfs: 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:

/sbin/mklogfs - from package: logfs-tools

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

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