sedispatch: 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/sedispatch - from package: setroubleshoot-server

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

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