gifti_test: 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/gifti_test - from package: gifti-bin

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

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