Intelligentedu Best New Free Computer IT Training Tutorial Resources

Here is a great learning resource for becoming more acquainted with getting Linux more secure and understanding where you could be vulnerable.

Hacking Linux Exposed:
www.hackinglinuxexposed.com/articles/

These are excellent Linux security tutorial articles written by Brian Hatch.

Everyone Needs Backup:
www.hackinglinuxexposed.com/articles/20020219.html
Security with Obscurity is Great:
www.hackinglinuxexposed.com/articles/20020312.wml
No Reboot Necessary (OpenSSH):
www.hackinglinuxexposed.com/articles/20020319.html
The Hazards of Inconsistency:
www.hackinglinuxexposed.com/articles/20020402.html
Our Electronic Entry System:
www.hackinglinuxexposed.com/articles/20020409.html
SSL is Not a Magic Bullet:
www.hackinglinuxexposed.com/articles/20020423.html
Challenging the Man-in-the-Middle:
www.hackinglinuxexposed.com/articles/20020416.html
Solution to Challenging the Man in the Middle:
www.hackinglinuxexposed.com/articles/20020430.html
Recovering files from /Proc:
www.hackinglinuxexposed.com/articles/20020507.html
Investigating Processes, Part 1:
www.hackinglinuxexposed.com/articles/20020514.html
Our Continuing /proc and lsof Investigation:
www.hackinglinuxexposed.com/articles/20020521.html
Sign Everything, My Friends:
www.hackinglinuxexposed.com/articles/20020528.html
Architecture Diversity: A Security Perspective:
www.hackinglinuxexposed.com/articles/20020611.html
Boot Access is Root Access:
www.hackinglinuxexposed.com/articles/20020618.html
Hardening LILO Against Unauthorized Access:
www.hackinglinuxexposed.com/articles/20020625.html
Another Backdoor to Root Access:
www.hackinglinuxexposed.com/articles/20020702.html
Using DJBDNS and Getting Out of a BIND:
Installing the DJBDNS Software:
www.hackinglinuxexposed.com/articles/20020723.html
DJBDNS: The Pieces:
www.hackinglinuxexposed.com/articles/20020730.html
Making the Conversion: From BIND to tinydns:
www.hackinglinuxexposed.com/articles/20020806.html
Wrapping Up DJBDNS:
www.hackinglinuxexposed.com/articles/20020813.html
Executing Code From Non-executable Files:
www.hackinglinuxexposed.com/articles/20020827.html
Stunnel 4.00 Builds on Prior Success:
www.hackinglinuxexposed.com/articles/20020910.html
Greasing the Squeaky Wheels:
www.hackinglinuxexposed.com/articles/20020917.html
A Slap Upside the Head:
www.hackinglinuxexposed.com/articles/20020924.html
Creating an Anonymous FTP server with Publicfile:
www.hackinglinuxexposed.com/articles/20021001.html
Ten minute Firewall:
www.hackinglinuxexposed.com/articles/20021008.html
Firewalling /proc entries:
www.hackinglinuxexposed.com/articles/20021015.html
Vet the code or pay the price:
www.hackinglinuxexposed.com/articles/20021022.html
Audit trails are vital for post-compromise investigations:
www.hackinglinuxexposed.com/articles/20021106.html
Identifying a deleted account:
www.hackinglinuxexposed.com/articles/20021113.html
Keeping User-Level Access When Locked Out:
www.hackinglinuxexposed.com/articles/20021120.html
Challenge: How Did These Processes Get Here?:
www.hackinglinuxexposed.com/articles/20021127.html
/etc/inittab - The Most Overlooked Cracker Haven:
www.hackinglinuxexposed.com/articles/20021205.html
Secure Passwordless Logins with SSH Part 1:
www.hackinglinuxexposed.com/articles/20021211.html
Secure Passwordless Logins with SSH Part 2:
www.hackinglinuxexposed.com/articles/20021226.html
Secure Passwordless Logins with SSH Part 3:
www.hackinglinuxexposed.com/articles/20030109.html
The Authprogs SSH Command Authenticator (Passwordless SSH part 4):
www.hackinglinuxexposed.com/articles/20030115.html
Home grown crypto is bad crypto:
www.hackinglinuxexposed.com/articles/20030122.html
Cracking an algorithm bit by bit conclusion:
www.hackinglinuxexposed.com/articles/20030205.html
Egress filtering for a healthier Internet:
www.hackinglinuxexposed.com/articles/20030213.html
Preventing Syslog Denial of Service attacks:
www.hackinglinuxexposed.com/articles/20030220.html
SSH Tunneling part 1 - Local Forwarding:
www.hackinglinuxexposed.com/articles/20030228.html
SSH Tunneling part 2 - Remote Forwarding:
www.hackinglinuxexposed.com/articles/20030309.html
SSH Tunneling part 3 - Where does the crypto end?:
www.hackinglinuxexposed.com/articles/20030316.html
Beware the Ides of March:
www.hackinglinuxexposed.com/articles/20030323.html
The Upgrade Process: Restarting vs Rebooting:
www.hackinglinuxexposed.com/articles/20030409.html
Linux File Permission Confusion:
www.hackinglinuxexposed.com/articles/20030417.html
Linux File Permission Confusion pt 2:
www.hackinglinuxexposed.com/articles/20030424.html
Linux: the Securable Operating System:
www.hackinglinuxexposed.com/articles/20030427.html
Who's listening on that port?:
www.hackinglinuxexposed.com/articles/20030515.html
/proc/config offers a post-intrusion clue:
www.hackinglinuxexposed.com/articles/20030522.html
Linux file locking mechanisms - Flock, Lockf, and Fcntl:
www.hackinglinuxexposed.com/articles/20030616.html
Linux file locking mechanisms - Mandatory Locking:
www.hackinglinuxexposed.com/articles/20030623.html
Ten minute host firewall, Part 1:
www.hackinglinuxexposed.com/articles/20030703.html
Ten minute host firewall, Part 2:
www.hackinglinuxexposed.com/articles/20030709.html
Using iptables chains to simplify kernel ACL management:
www.hackinglinuxexposed.com/articles/20030722.html
Sniffing with Net::Pcap to stealthily managing iptables rules remotely, Part 1:
www.hackinglinuxexposed.com/articles/20030730.html
Running programs in response to sniffed DNS packets - stealthily managing iptables rules remotely, Part 2:
www.hackinglinuxexposed.com/articles/20030814.html
Running custom DNS queries - stealthily managing iptables rules remotely, Part 3:
www.hackinglinuxexposed.com/articles/20030825.html
The wrong way to upgrade your RPMs:
www.hackinglinuxexposed.com/articles/20030911.html
Nmap Version Detection Rocks:
www.hackinglinuxexposed.com/articles/20031006.html
File and email encryption with GnuPG (PGP) part one
www.hackinglinuxexposed.com/articles/20031204.html
The mysteriously persistently exploitable program explained:
www.hackinglinuxexposed.com/articles/20031214.html
File and email encryption with GnuPG (PGP), part 2:
www.hackinglinuxexposed.com/articles/20031231.html
File and email encryption with GnuPG (PGP) part 3:
www.hackinglinuxexposed.com/articles/20040219.html
File and email encryption with GnuPG (PGP) part 4:
www.hackinglinuxexposed.com/articles/20040311.html
File and email encryption with GnuPG (PGP) part 5:
www.hackinglinuxexposed.com/articles/20040414.html
File and email encryption with GnuPG (PGP) part 6:
www.hackinglinuxexposed.com/articles/20040427.html
The ease of (ab)using X11, Part 1:
www.hackinglinuxexposed.com/articles/20040513.html
The ease of (ab)using X11, Part 2:
www.hackinglinuxexposed.com/articles/20040608.html
SSH Users beware: The hazards of X11 forwarding:
www.hackinglinuxexposed.com/articles/20040705.html
SSH Bouncing - How to get through firewalls easily:
www.hackinglinuxexposed.com/articles/20040830.html
SSH Bouncing - How to get through firewalls easily, Part 2:
www.hackinglinuxexposed.com/articles/20040923.html
The big Hiatus:
www.hackinglinuxexposed.com/articles/20041127.html

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