Use Nmap To Scan Your Network

The Nmap utility will scan devices connected to your network. Nmap is a free open-source utility used by network admins and anyone to explore, scan, secure and audit the network. For example, if your internal network is network, you can use the following Nmap options to scan your network.

nmap -sP

The command above produces the following output:

As you can see, the nmap utility has found 8 devices connected to my network. It usually takes 30 seconds or so to scan the entire network. With the available data, I can now ping, ssh, or view the device via web browser if that service is available. Nmap makes troubleshooting the network that much more easier.

Just like most Linux utilities, nmap has a ton of options worth checking. Simply type -- help to read more options.

nmap --help

If you are a Windows user, the nmap utility is available for download.

For Ubuntu users, simply type the following to install

sudo apt-get install nmap

7Zip Is Better Than PKZip and Winzip

For Windows users who have been using Pkzip or the Winzip utilities for years, you should consider using 7zip. I’ll tell you why. First of all, it’s open source. It can’t get any better than that.

It can pack and unpack ZIP, GZIP, BZIP2 and TAR formats. It can unpack the following: ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z. The 7Z format has the highest compression ratio of any packing utility out there. It has a compression ratio of 2-10% better than the ratio provided by Pkzip and Winzip. It also comes with a strong AES-256 encryption in 7z and ZIP formats.

In addition, it has a powerful File Manager, a powerful command line version, and a plugin for the Far Manager. If that’s not enough, it is also available in 74 languages. Download 7zip and give it a try.