fasta2esd: 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/fasta2esd - from package: exonerate

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

On Debian possible default full paths are:

/usr/bin/fasta2esd - from package: exonerate

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

Error in other languages:
fasta2esd: bevel nie gevind nie
fasta2esd: comandă negăsită
fasta2esd: comando não encontrado
fasta2esd: commande introuvable
fasta2esd: command not found
fasta2esd: käsku ei ole
fasta2esd: không tìm thấy lệnh
fasta2esd: komanda nerasta
fasta2esd: Kommando nicht gefunden.
fasta2esd: kommandot finns inte
fasta2esd: komut yok
fasta2esd: nie znaleziono polecenia
fasta2esd: níor aimsíodh an t-ordú
fasta2esd: no se encontró la orden
fasta2esd: no s'ha trobat l'ordre
fasta2esd: opdracht niet gevonden
fasta2esd: parancs nem található
fasta2esd: perintah tidak ditemukan
fasta2esd: príkaz nenájdený
fasta2esd: příkaz nenalezen
fasta2esd: команда не найдена
fasta2esd: командата не е открита
fasta2esd: 命令找不到
fasta2esd: コマンドが見つかりません