bp_query_entrez_taxa: 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/bp_query_entrez_taxa - from package: bioperl

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

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