blastall: 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/blastall - from package: blast2
/usr/share/ncbi-blast+/bin/blastall - from package: ncbi-blast+-legacy

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

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