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Realize the flexibility of OpenSSH

Realize the flexibility of OpenSSH

With OpenSSH, you can access systems remotely and securely, transfer files securely, secure normally insecure services, and much more.

Delegate privileges to users with sudo

Sudo allows for flexible delegation of user privileges, and the ability to fine-tune those privileges to provide different levels of access.

Monday, June 23 2008 02:35 PM
Find more stories in: Open source, Networking

Dig for more data in the /proc directory

The virtual filesystem provides a plethora of information on the hardware of the running system, and of the various processes running.

Monday, June 16 2008 11:43 AM
Find more stories in: Open source, Operating systems

Find weak OpenSSL/OpenSSH keys and secure your system

Use a tool provided by the Debian team, which can be run regardless of whether the Debian system is used, to determine if weak keys exist in the system.

Monday, June 09 2008 03:13 PM
Find more stories in: Open source, Linux

Log Linux services with runit

Learn how to keep critical information on top of supervising services, with a program called svlogd in runit.

Monday, June 02 2008 01:43 PM
Find more stories in: Open source, Linux

Use runit to supervise Linux services

Traditional Linux systems use SysV init for starting the system: running init scripts to start and stop services as well as manage system runlevels and one-time startup scripts.

Monday, May 26 2008 03:27 PM
Find more stories in: Linux, Open source

Learn to use the openssl command-line program

More than just an open source SSL library implementation, OpenSSL can be used to create, request, sign, and revoke certificates and can also be used to perform other cryptographic operations.

Monday, May 12 2008 04:53 PM
Find more stories in: Networking, Security

Try IRC with Irssi to communicate via chat

IRC, or Internet Relay Chat, is a fantastic method of communication with peers, particularly if you are part of a development group or want to get support with a particular piece of software or project.

Monday, May 05 2008 11:10 AM
Find more stories in: Open source, Instant messaging

Using vi key bindings in bash and zsh

When making command-line changes, you can choose a style that makes sense and makes the use of the command line faster and more efficient.

Monday, April 28 2008 12:19 PM
Find more stories in: Open source

Use command-line MySQL for additional flexibility

The more popular ways of using MySQL are to use GUI front ends, such as phpMyAdmin or the MySQL GUI administration tools.

Monday, April 21 2008 03:46 PM
Find more stories in: Software

Securely delete files with shred

Scrub your data using the shred command for files that contain sensitive information, so that they cannot be recovered later with data retrieval tools.

Monday, April 14 2008 01:18 PM
Find more stories in: Linux, Open source, Security Management, Security applications/tools

Detect intruders on your network with Snort

Snort is a Network Intrusion Detection System (NIDS), which can view and analyze packets on a network to determine whether or not a system is being attacked by remote.

Monday, April 07 2008 12:53 PM
Find more stories in: Networking, Open source

Configure Snort to log packets to MySQL

Administrators can take advantage of the Snort facility to to detect intrusions to the network.

Monday, March 31 2008 01:50 PM
Find more stories in: Networking, Open source

Set up a TFTP server for easy network boots

Although the occasion may be rare, there can come a time when you need to set up and use a Trivial FTP (or TFTP) server.

Monday, March 24 2008 12:29 PM
Find more stories in: Networking, Open source

Set up ISC's dhcpd server

With DHCP, simply changing one configuration file lets the administrator set up hosts with different IPs or netmasks instead of changing each host individually.

Monday, March 17 2008 12:27 PM
Find more stories in: Networking, Open source

Secure temporary files in Linux

Ensuring proper permissions and using restrictive mount options can prevent bots and rootkits from compromising a system.

Monday, March 10 2008 10:40 AM
Find more stories in: Linux

Encrypting and decrypting files with GnuPG

You can use GnuPG, the open replacement for PGP, to manage cryptographic signatures to files or e-mail, as well as a tool to encrypt and decrypt sensitive files.

Monday, March 03 2008 11:09 AM
Find more stories in: Digital signatures, Open source

Tuning Linux kernel for more aggressive network throughput

The Linux kernel and the distributions that package it typically provide very conservative defaults to certain network settings that affect networking parameters.

Monday, February 25 2008 02:48 PM
Find more stories in: Linux

Get started with GnuPG

Available with every Linux distribution, GnuPG can be used to encrypt regular files or e-mail and can also verify the integrity of files or e-mail via cryptographic signatures.

Monday, February 18 2008 03:38 PM
Find more stories in: Linux, Open source

Use tcpdump for network debugging

Tcpdump may not be as feature-rich as programs such as Wireshark, but it is an extremely useful network packet tracing system.

Monday, February 11 2008 11:30 AM
Find more stories in: Open source, Network administration/implementation, Network standards/protocols

Auto-reboot Linux after a kernel panic

Making a small modification to a configuration file that tweaks many kernel operating parameters can automatically reboot the operating system.

Monday, February 04 2008 09:30 AM
Find more stories in: Linux, Disaster recovery, Data backup, disaster recovery

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OOXML: Triumph or Pyrrhic victory?

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"One more such victory will utterly undo me!" said Pyrrhus of Epirus after defeating the Romans at Asculum in 279 BC.

Although won, this battle and..... by Peter Junge

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