A chronological documentation test project, nothing serious, really!
This post describes how to disable IPv6 on a Redhat (RHEL5) installation. I haven’t had the time to test it on other version of Redhat. Edit /etc/sysconfig/network and change NETWORKING_IPV6=no Edit /etc/modprobe.conf and add these lines alias net-pf-10 off alias ipv6 off Stop the ipv6tables service # service ip6tables stop Disable the ipv6tables service # […]
This post describes how to allow users in the wheel group to use the sudo command without being prompted for the root password Edit /etc/sudoers Uncomment the line %WHEEL ALL=(ALL) NOPASSWD: ALL Add a user to the wheel group # gpasswd -a username wheel This does also work on Fedora and other Redhat based distributions.
It is possible to control which source address is put in to ARP headers using the ARP_ANNOUNCE option in the kernel. It takes the following values. 0 (default) Any local address 1 Use address from the same subnet as the target address 2 prefer primary address. This is worth knowing because the default can give […]
rkhunter has given several warnings (“One or more warnings have been found while checking the system.”) lately and this has forced me to check the installations repeatedly only to determine the fact that it was a false positive. On Redhat systems and their derivatives (Fedora, CentOS…) a easy check can be performed to determine if […]
To list the contents of a package just run the command # rpm -ql packagename Example # rpm -ql nmap /usr/bin/nmap /usr/share/doc/nmap-3.70 /usr/share/doc/nmap-3.70/COPYING /usr/share/doc/nmap-3.70/COPYING.OpenSSL /usr/share/doc/nmap-3.70/README /usr/share/doc/nmap-3.70/nmap-fingerprinting-article.txt /usr/share/doc/nmap-3.70/nmap.deprecated.txt /usr/share/doc/nmap-3.70/nmap.usage.txt /usr/share/doc/nmap-3.70/nmap_doc.html /usr/share/doc/nmap-3.70/nmap_manpage.html /usr/share/man/man1/nmap.1.gz /usr/share/nmap /usr/share/nmap/nmap-mac-prefixes /usr/share/nmap/nmap-os-fingerprints /usr/share/nmap/nmap-protocols /usr/share/nmap/nmap-rpc /usr/share/nmap/nmap-service-probes /usr/share/nmap/nmap-services