gnc-fq-dump: 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/gnc-fq-dump - from package: gnucash

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

On Debian possible default full paths are:

/usr/bin/gnc-fq-dump - from package: gnucash

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

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