parse_err: 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/parse_err - from package: tboot

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

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