jigit-mkimage: 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/jigit-mkimage - from package: jigit

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

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