gigedit: 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/gigedit - from package: gigedit

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

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