mapview: 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/mapview - from package: mummer

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

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