jing: 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/jing - from package: jing

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

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