fastanrdb: 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/fastanrdb - from package: exonerate

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

On Debian possible default full paths are:

/usr/bin/fastanrdb - from package: exonerate

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

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