jh_linkjars: 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/jh_linkjars - from package: javahelper

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

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