hal-probe-vmmouse: 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

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/hal-probe-vmmouse - from package: xorg-x11-drv-vmmouse

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