fts_server: 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/sbin/fts_server - from package: fts-server

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

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