jgraph: 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/jgraph - from package: jgraph

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

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