Learn how to use a host of Linux commands in these 2-minute video tutorials from Sandra Henry-Stocker, author of the Unix as a Second Language blog.
In this Linux tip, we’re going to look at the lscpu command that provides a lot of information on your system’s CPU or CPUs.
In this Linux tip, learn how to use the unset command. It’s a command that removes an environment variable from your current login session.
In this Linux tip, learn how to use the look command. It allows you to easily pick out lines that begin with a given string from a file that you specify. The look command only matches beginnings of lines and doesn’t work with wild cards. For more complex searches, you’re better off using grep which isn’t limited to the beginnings of lines and has a lot more options.
In this Linux tip, learn how to use the df command. It reports on disk space. It’s important to check disk space from time to time to ensure that the system is not about to run out of space.
In this Linux tip, we’re going to look at the chkrootkit command. It’s a command that will examine your system for rootkits -- generally malicious software that enables unauthorized access to a system.
In this Linux tip, we’re going to look at the dig command. It’s generally used to troubleshoot problems with DNS (the domain naming system). Learn how to get information on what DNS can tell you about a system you’re hoping to connect to.
In this Linux tip, learn how to use the diff command. It’s one of a number of commands that can report on file differences. If the files are text files, the command will display the differences line by line. If they’re some other kind of files – image files or binaries, diff will only tell you whether the files are the same or different.
In this Linux tip, learn how to use the mkdir (make directory) command. It’s one of the basic commands that every Linux user ought to know, but there are some rules and a couple options that aren’t obvious.
In this Linux tip, learn how to use the uptime command. It tells us how long the system has been up and running – and provides some additional information as well.
In this Linux tip, learn how to use the finger command. It provides information on the selected user account. Once it’s installed, all you have to do to use the finger command is type “finger” followed by the username of the account you want to check.
In this Linux tip, we’re going to look at the && operator that provides a useful functionality in scripts. It represents an AND operator. But, first, to demonstrate how this operator works, we’ll run some simple commands on the command line.
In this Linux tip, learn how to use the OR (||) operator that provides a useful functionality in scripts. But, first, to demonstrate how this operator works, we’ll run a couple simple commands on the command line.
In this Linux tip, learn how to use the chage command. The name stands for “change age” and allows Linux admins to manipulate aging settings for user accounts – when passwords will must be changed or accounts will expire.
In this Linux tip, learn how to use the mv (move) command. It allows you to rename files, move files to other places in the file system or do both of those things at the same time.
How to use the script command to capture a series of commands that you run along with any output that they generate. This be helpful when you are documenting a process or testing a series of commands.
In this Linux tip, we’re going to look at xz command. It’s a relatively new command for compressing and decompressing files and works a lot like zip and bzip2. With xz, compressed files will take on the extension “xz”.
The at command allows you to schedule tasks to run at some other time – whether later that same day or way in the future. It allows you to schedule simple commands or complex scripts to run when you need them to run. Unlike the cron command, at is used to set up a one-time task.
The convert command allows you to manipulate image files on the command line and has a LOT of options. We’ll just look at a few of the many kinds of changes you can make.
The tac command displays text files “upside-down” — the last lines show up first and the first last. If you ever need to invert a file, you’ll find this quick and easy command ready to make the task easy.
In this Linux tip, learn to use the ln command, which can create either type of link on Linux systems.
In this Linux tip, learn how to use the pwd (present working directory) command, which can tell you where in the file system you are currently located.
In this Linux tip, learn how to use tabs for autocompletion. This practice means that you don’t have to type complete file names or even complete commands – and you’ll probably avoid some typos in the process.
In this Linux tip, learn how to use the umask command. You can use it to set the default permissions for files that you create.
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