Monthly Archives: November 2007
About the /proc and -xdev parameter for ‘find’
/proc is a pseudo-filesystem used to access process information from the kernel. It doesn’t use any storage space and uses little memory. On Linux, you can sometimes make modifications to the running kernel by modifying “files” in /proc. If / is full, run a command similar to the following to sort all files in the … Continue reading
Difference Between NFS, DNS, NIS+, and NIS
NFS, DNS, NIS and NIS+… that’s a lot of acronyms! Network File System NFS is Sun’s Networked File System, and by now, more or less, the de facto method of sharing file systems between computers. Domain Name Service DNS is the Domain Name Service, which is the way information about hostnames and addresses are shared … Continue reading
All About Virtual Interface in Solaris
Solaris (and other OS) allows the use of Virtual IP. Virtual interface or logical interface allows an Operating system with only one (1) network device to have multiple numbers of IP address. The Problem Got a page today, just now that one of our managed server went down. It’s a ping/connectivity page. Logged in to … Continue reading
Cover Your Tracks After Hacking A UNIX Box
In the Monitoring User Login post, the commands and files that are related in tracking user activities are discussed. Here are some ways of covering your fingerprints on a server using the files that monitors user logins. We want to erase any trace that will show that we were inside the box. In doing so … Continue reading
UNIX Quick Tip: Changing The Time Stamp Of A File
This tip is a give away. Everyone knows this, but for those who doesn’t or forgot… here’s refresher… Here’s a typical output of a file listing using `ls -l` on a directory: [root@unix-box icons]# ls -l | more total 636 -rw-r–r– 1 elizar root 246 Aug 26 2005 a.gif -rw-r–r– 1 elizar root 242 Aug … Continue reading