Unix Commands to Try When You're Bored
Not every Unix command sparks with novelty. After all, the OS has now been around for roughly forty years and the spark wears off. But there are some commands that pick up from where the basics run out of steam. Jump on a Linux box and try these out when you have a little free time. You might surprise yourself with some new tricks for your bag of Unix goodies.
Before we get started with the commands you may not have heard of before, here's a tired and true Unix command that we've all been using for decades, but maybe not this particular way. This grep command represents the simplest way to remove blanks lines from a file that I've ever seen.
grep . oldfile > newfile
Got that? It matches any lines with anything (i.e., not nothing) in them and tosses them into the second file. Hey, this is even easier than my old "grep -v ^$ oldfile > newfile" command that would specifically omit empty lines from the new file.
Now let's look at a command you might not have come across before.
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