Выполните следующее, чтобы видеть, работает ли демон крона:
ps -e | grep cron
Кроме того, взгляните в
/var/log/cron
видеть, существуют ли какие-либо записи.
Redhat 4.x and CentOS 4.x will install just fine in that RAM/CPU footprint.
LinuxQuestions.org has an answer:
You don't want to have less than 256MB of RAM in your system if you want to run RHEL 4, especially with an X desktop. I also wouldn't go much slower than a 500mhz CPU, either.