gifclip: 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/gifclip - from package: giflib-utils

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

On Debian possible default full paths are:

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

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

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