jh_manifest: 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_manifest - from package: javahelper

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

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