Sometimes you want the root user or other trusted users to be able to run cronjobs or timed scripts with at. In order to lock these down, you will need to create a cron.deny and at.deny file inside /etc with the names of all blocked users. An easy way to do this is to parse /etc/passwd. The script below will do this for you.
echo “Locking down Cron”
touch /etc/cron.allow
chmod 600 /etc/cron.allow
awk -F: ‘{print $1}’ /etc/passwd | grep -v root > /etc/cron.deny
echo …
If you have repaired your system from a backup tape (by dump or tar), for example, you will need to repair the bootstrap area.You need to re-install the bootstrap code that is grub.
Please perform the following steps:
Boot from OS(Redhat,Fedora,CentOS) installation disc (for example, CD #1 or DVD).
Type “linux rescue” at the “boot:” prompt.
Mount all filesystems in read-write mode.
Change root to real root (‘/’) on your hard disk:
# chroot /mnt/sysimage
Re-install bootstrap code (GRUB).
If you wish to re-install GRUB to the MBR …
Ken Smith has announced the availability of the second release candidate for Freebsd7.3: “The third and what should be last of the test builds for the 7.3-RELEASE cycle, 7.3-RC2, is available for amd64, i386, pc98, and sparc64 architectures. The target schedule, as well as the current status of the release is available here. The schedule has slipped by a bit over a week so the actual target for the release announcement is really about a week and a half from …
A security issue affects the following Ubuntu releases:
Ubuntu 6.06 LTS Ubuntu 8.04 LTS Ubuntu 8.10 Ubuntu 9.04 Ubuntu 9.10
This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu.
The problem can be corrected by upgrading your system to the following package versions:
Ubuntu 6.06 LTS:
sudo 1.6.8p12-1ubuntu6.1
sudo-ldap …
