gmanedit: 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/gmanedit - from package: gmanedit

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

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