mtime: 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/lib/plan9/bin/mtime - from package: 9base

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

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