Linux and Unix cheatsheet
Hardening the TCP/IP stack to SYN attacks
How to detect a SYN attack It is very simple to detect SYN attacks. The netstat command shows us how many connections are currently in the h...
Linux Netfilter tweaks for High traffic servers
If you are serving a high traffic web/DNS server, and recently having PING loss to the server and not all HTTP request were successful to i...
Remove weak ciphers from SSH Server
Use nmap to check current loaded ciphers. Download the file http://nmap.org/svn/scripts/ssh2-enum-algos.nse local nmap = requ...
Mac OSX cmd auto tab completion
create or edit the ~/.inputrc
set completion-ignore-case on
set show-all-if-ambiguous on
TAB: menu-complete
open a new terminal session, and use tab to try the auto-completion
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