manicheck: 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/manicheck - from package: dist

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

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