rst2odt: 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/rst2odt - from package: python-docutils

You may install the required package with command yum install {package}
Error in other languages:
rst2odt: bevel nie gevind nie
rst2odt: comandă negăsită
rst2odt: comando não encontrado
rst2odt: commande introuvable
rst2odt: command not found
rst2odt: käsku ei ole
rst2odt: không tìm thấy lệnh
rst2odt: komanda nerasta
rst2odt: Kommando nicht gefunden.
rst2odt: kommandot finns inte
rst2odt: komut yok
rst2odt: nie znaleziono polecenia
rst2odt: níor aimsíodh an t-ordú
rst2odt: no se encontró la orden
rst2odt: no s'ha trobat l'ordre
rst2odt: opdracht niet gevonden
rst2odt: parancs nem található
rst2odt: perintah tidak ditemukan
rst2odt: príkaz nenájdený
rst2odt: příkaz nenalezen
rst2odt: команда не найдена
rst2odt: командата не е открита
rst2odt: 命令找不到
rst2odt: コマンドが見つかりません