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Author Archives: Network World Data Center

Linux Tips: How to count the days between two dates

This trick works because Linux stores dates/times as the number of seconds since Jan 1, 1970. This doesn’t mean you can’t look at earlier dates; the earlier dates are simply stored as negative numbers.

How to repeat commands using !!

In this Linux tip, we’re going to look at how to repeat commands using !! or the up-arrow key on your keyboard. Any time you want to rerun previous commands on the Linux command line, these tricks make it easier to run the command again.

How to use the IP A command

In this Linux tip, we’re going to look into the ip a command. It’s one that provides details on your network connection. If you want to type some additional letters, you can enter the command ip address instead, but the results will be the same.

How to use the htop command to monitor system performance

In this Linux tip, we’re going to take a look at htop – a very useful command-line tool for looking into system performance and nailing down the cause of system slowdowns.

How to extract substrings: 2-Minute Linux Tips

In this Linux tip, learn several ways to extract substrings on Linux.

How to use the grep command to cheat in Wordle: 2-Minute Linux Tips

In this Linux tip, learn how you can use the grep command to cheat when you play Wordle. Linux systems can be very helpful in this because of the many commands it provides and the fact that it includes a lengthy words file.

How to use the strace and ltrace commands: 2-Minute Linux Tips

In this Linux tip, learn how to use the strace and ltrace commands. They provide information on the system and library calls that a Linux process makes and this information can help when you're troubleshooting a process that's not behaving as you'd expect.

How to set up quick functions to run calculations: 2-Minute Linux Tips

In this Linux tip, we’re going to look at a simple way to set up a quick function that allows you to run calculations a lot more easily than usual.

How to use the && (AND) and || (OR) operators

In this Linux tip, we’re going to look at the && (AND) and || (OR) operators and how they can be used.

How to use the awk command | 2-Minute Linux Tips

In this Linux tip, we look at an awk command that you can use to remove duplicate lines from text files – even when those lines aren't consecutive.

How to use the btrfsck command

In this Linux tip, we’re going to look at the btrfsck command. It provides file system checking for btrfs file systems – sometimes referred to as the "better" file systems, but actually named for its B-tree underpinnings.

2-Minute Linux Tips: How to use the date command

In this Linux tip, we’re going to look at using the date command to run tests. You can always use the date command to see what day it is, but you can also use it in scripts to test what time, day of the month or month of the year it is (and a lot of other things too).

How to use the clamscan tool: 2-Minute Linux Tips

In this Linux tip, we’re going to look at clamav. It's a free and open source tool that lets you scan for viruses on Linux.

Coming soon: Eco-friendly data centers | TECH(feed)

As the push for sustainability across all businesses intensifies, so too will the push for greener IT infrastructure. Data centers are notorious for giving off thermal energy and being somewhat energy inefficient. Researchers at Rice University are looking for solutions to turn this heat into something a little more useful. In this episode of TECH(feed), Juliet discusses the push for green IT and how data centers could become much more energy efficient.