manlifter: 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/manlifter - from package: doclifter

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

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