jxplorer: 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/jxplorer - from package: jxplorer

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