gifti_tool: 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_tool - from package: gifti-bin

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

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