Restoration of RHEL after disk crash

1. Lower resolution of monitor
2. chkconfig
   chkconfig --list
   chkconfig vsftpd on
   service vsftpd start
3. Restore /etc/sysctl
4. cp sysctl.conf sysctl.conf.default
5. cp $ETC/sysctl.conf /etc
6. Restore /etc/sudoers
7. modify group adding bezroun to wheel
8. Modify passwd bezroun

export