![]() After we review the use of the nano text editor we'll go into more depth with TACC modules. We have included ones that we will use throughout the course and that you will commonly make use of. Section 1 has multiple lines involving "module load " Programers commonly make use of behavior to leave notes for others, or even themselves at a later date as to what particular lines of a script are actually doing. Anything after a # symbol will not be executed by any program. Any line begins with a # symbol, it is "commented out".Let's look at what some of these lines do with a little more information: This will print several lines of text to the terminal window. Use the ls command to check if you have a profile already set up in your home directory. If you already have a profile set up on lonestar that you like, we want to make sure that we don't destroy it but it will be important to make sure that we change it temporarily so everyone is working from the same place through the class. I've set up a common profile for you to start with that will help you know where you are in the file system and make it easier to access some of our shared resources. Whenever you login via an interactive shell as you did above, a well-known script is executed by the shell to establish your favorite environment settings. The default for TACC's Linux (and most other Linuxes) is bash ( bourne again shell), which we will use throughout. There are many flavors of Linux/Unix shells. Setting up your lonestar profile and other variables.Otherwise type "yes" to bypass the security check. If you ever see a security warning logging into somewhere that you use commonly you should answer no and try to figure out why you were warned. The same will be true if you log into any of the other TACC resources, or any other remote computer. If you have never logged into lonestar from the computer you are currently using before, you will be issued a security warning. ![]() While backspace will work if you know you made a mistake, it's often easier to just hit enter and try again. For this reason, even as you type to enter your password, nothing will be displayed on the screen. Since this is your first code box, it is probably worth expanding even if you know how to log into lonestar already.Īs a matter of internet safety, the terminal window knows you are entering a password and may not want your neighbor to see what it is. Using what we have just taught you about code blocks, log into lonestar. Click here for an overview of this process, and click here to begin setting it up. If you are ever unsure of what to replace the text with, just ask.īefore logging onto TACC servers, multi-factor authentication must be set up. We try to put informative text within the brackets so you know what to replace it with. Things that exist within symbols represent something that you need to replace before sending it to the terminal. Text inside of code blocks represent "right" answers, and should either be typed EXACTLY into the terminal window as they are, or copy pasted with a notable exception. Access the answer by clicking "expand source" on the right hand side of the code block.
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