jalv: 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/jalv - from package: jalv

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