jmapviewer: 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/jmapviewer - from package: jmapviewer

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

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