asn2fsa: 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/asn2fsa - from package: ncbi-tools-bin

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

Error in other languages:
asn2fsa: bevel nie gevind nie
asn2fsa: comandă negăsită
asn2fsa: comando não encontrado
asn2fsa: commande introuvable
asn2fsa: command not found
asn2fsa: käsku ei ole
asn2fsa: không tìm thấy lệnh
asn2fsa: komanda nerasta
asn2fsa: Kommando nicht gefunden.
asn2fsa: kommandot finns inte
asn2fsa: komut yok
asn2fsa: nie znaleziono polecenia
asn2fsa: níor aimsíodh an t-ordú
asn2fsa: no se encontró la orden
asn2fsa: no s'ha trobat l'ordre
asn2fsa: opdracht niet gevonden
asn2fsa: parancs nem található
asn2fsa: perintah tidak ditemukan
asn2fsa: príkaz nenájdený
asn2fsa: příkaz nenalezen
asn2fsa: команда не найдена
asn2fsa: командата не е открита
asn2fsa: 命令找不到
asn2fsa: コマンドが見つかりません