mincheader: 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/mincheader - from package: minc-tools

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

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