jconv: 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/jconv - from package: libjconv-bin

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

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