Nmap is short for Network Mapper. It is an open source security tool for network exploration, security scanning and auditing. However, nmap command comes with lots of options that can make the utility more robust and difficult to follow for new users.
The purpose of this post is to introduce a user to the nmap command line tool to scan a host and/or network, so to find out the possible vulnerable points in the hosts. You will also learn how to use Nmap for offensive and defensive purposes.
Most sysadmin will run low on disk space. Users will demand more space and you need to free space. You will find out files that’s a waste of space and delete it or move to an archive medium. But, how do you find the right files to delete that can help recover maximum space? Say hello to agedu tool (pronounced as ‘age dee you’) – it scans a directory tree and produces reports about how much disk space is used in each directory and subdirectory, and also how that usage of disk space corresponds to files with last-access times a long time ago. In other words, this command might help you to free up disk space.
Oneko is a little fun app. It will change your cursor into mouse and creates a little cute cat and the cat start chasing around your mouse cursor. The word “neko” means “cat” in Japanese and it was originally written by a Japanese author as a Macintosh desktop accessory.
The pv command allows you to see the progress of data through a pipeline. It provides the following info:
- Time elapsed
- Percentage completed (with progress bar)
- Current throughput rate
- Total data transferred
In this week:
Dell to sale Ubuntu laptops again
Dell will be officially re-entering the Linux laptop market. It will sell a developer edition of one of its Ultrabooks XPS laptop. It will come pre-loaded with Ubuntu 12.04 LTS. A first look at Dell’s ‘Sputnik’ Ubuntu Linux developer laptop is available here.
You can display man pages in colors. Similarly, you can display info pages in colors. The info command is used under Linux or Unix to read multipage documentation and act as help viewer working on a command line interface, useful when there is no GUI available on the server. The info command processes info files. All info files are are in Texinfo format. You get the documentation tree. pinfo is a little known tool that can display info pages in colors.