fastaremove: 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/fastaremove - from package: exonerate

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

On Debian possible default full paths are:

/usr/bin/fastaremove - from package: exonerate

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

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