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

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

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