Generate passwords with openssl

You can generate some good (high entropy) passwords using this method.

Print out only last revision in list of patches

This will print out a list of patches that omits earlier revs of the same patch. This can be useful to check if a system is at the same level as another (via a diff) system but possibly went through a different patch cycle and ended with different patches at lower revisions.

vmstat case studies

Look at some problem systems…

update files in a solaris package without rebuilding the package

Using ipfilter to alter nmap OS detection results

nmap is often used to perform OS detection on remote systems if it cannot be determined by other means. It sends tcp packets which have problems and detects how each handles the errors. By tweaking things in ipflter we can trick nmap into thinking it is dealing with some other OS or be less certain about it’s guess. Some additional resource are usually available in the OS sysctl variables (FreeBSD) and ndd settings (solaris) to help control things also.

using camcontrol to find information and dynamically add/remove SCSI devices

camcontrol is a very useful command for finding information and for adding and removing SCSI devices.

eject a cdrom in freebsd

This is the way via software to eject a cdrom under freebsd

expanding aliases in postfix