jhindexer: command not found

Have You tried accessing the binary with the full path?

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/jhindexer - from package: javahelp2

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