morbid: command not found

Have You tried accessing the binary with the full path?

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/morbid - from package: python-morbid

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