Linux and Unix cheatsheet
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...
TIME_WAIT in netstat
So, ever wonder what all those TIME_WAITs are doing in your netstat listing? Okay, for those of you who don't spend all your waking hou...
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...
add timestamp to bash history?
wish to add timestamp to bash history?
$ echo 'export HISTTIMEFORMAT="%F %T "' >> /etc/bashrc
Logout and re-login, and you shall be able to see timestamp on your "history" command.
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