fdlist: 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/fdlist - from package: fdutils

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

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