giftext: 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 CentOS possible default full paths are:

/usr/bin/giftext - from package: giflib-utils

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/giftext - from package: giflib-tools

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

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