Self-tutoring about Linux: the tutor mentions awk. awk is a utility for getting values from tabulated data. It works line by line. For instance, awk ‘{print $2}’ input.txt will print the second field in each record of input.txt. Source: geeksforgeeks.org
Self-tutoring about using Linux: the tutor mentions a way to find your own uid. Set a task going such as sleep 360 & & in the command above puts it to the background so you can still run the terminal. …
Self-tutoring about (Li|U)nix: the tutor mentions another neat command. The “dot” is just a period. A simple example of the dot command is . file0 If file0 contains Unix commands, they will be executed. Interestingly, with the dot command, file0 …
Self-tutoring about Linux: the tutor mentions its neat tr command. tr target replacement is one form of tr, with input being piped to it or redirected to it. For instance, tr “8” “9” < infile.txt will display the file infile.txt …
Self-tutoring about Linux: the tutor mentions a couple of ideas about hard links. In Linux, a hard link is another name for the linked file. It reads from the same disk location as the file’s original name. Moreover, if the …
Self-tutoring about Linux text editors: the tutor mentions selecting multiple lines in Nano. Here is how it works for me: Ctrl+^ to start the selection, then use the arrow keys to extend it. Ctrl+K cuts, while Ctrl+U uncuts to your …
Self-tutoring about Linux: the tutor mentions Lubuntu. In my post from Feb 18, 2020, I mention Lubuntu. It has slim resource requirements. I’m running it right now. This computer has 1GByte of ram and it’s a Pentium 4. The fact …
Self-tutoring about Linux: the tutor mentions a neat trick. When you’re from the 70s (as I am), you might carry mental baggage. I recall the PrtScr button back from my first days with DOS. I might have used it then. …
Self-tutoring about Ubuntu: the tutor mentions sudo. In Linux, some tasks require elevated privileges. Trying to do such an action without assuming elevated privilege (sudo in Ubuntu) may lead to an error. The system is designed to prevent less-privileged users …
Self-tutoring about Ubuntu Linux: the tutor mentions command-line update. I resurrected a computer that likely hadn’t run in 8 years (or longer) using Lubuntu. It identifies, from the terminal, as Ubuntu 18.04. I tried updating its software from the GUI …
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