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hpr_transcripts/hpr0185.txt

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+Episode: 185
+Title: HPR0185: 3 tips
+Source: https://hub.hackerpublicradio.org/ccdn.php?filename=/eps/hpr0185/hpr0185.mp3
+Transcribed: 2025-10-07 13:10:02
+
+---
+
+Music
+Today I'm going to be talking about three utilities that I use on a regular basis on the
+command line, nor just speed up some of the things that I do.
+First one is literally speeding up things.
+I used to speed up the podcast that I download, and I used the SOX command.
+The SOX is the Swiss Army Knife of command line audio conversion, and after Bash Potter
+runs I run a script to look for MP3s and Aug files and convert them so that the speed
+is increased by 1.5, but people don't end up speeding like chipbunks.
+The downside of doing this, of course, is that podcasts that showcase independent music
+like TLL, TS, lot of Linux links and source junk.
+You're going to have to keep the original of those podcasts around so that you can listen
+to that music.
+Now, the SOX command, typically what you do is you use this for conversion, converting
+a file, so you might use SOX-based input.mp3, based output.org, and simply go and convert
+the input MP3 file into an Aug format.
+If you tag on the keyword tempo to the end of that, SOX-based input.mp3, space-output.org,
+space-tempo, space-1.5, or whatever you want to speed it up by, then that will go and
+process the file, and it will speed up the text without increasing the pitch.
+It takes a little while you could use it, but it does allow you to get a lot more podcasts
+listening into your day.
+Another thing that you might find yourself doing from time to time is using the opa-al-key
+to impressing enter to repeat the same command over and over again, so you might do this,
+for example, if you're doing a FTP from a location and you've seen the file increase or you're
+copying one file to another, or you simply, I don't know, you run a 90 particular command
+and you want to see the output over and over again.
+What I do from time to time is put back command into an infinite loop, and then use the
+sleep command, which will pause the process for a number of seconds, and that will reroll
+the command again.
+So let's take an example of using the LS command here.
+You would use, you would type the command, while space, open-square bracket, space, double
+quotes, x, double quotes, space, equals, double quotes, x again, double quotes, space,
+slow square bracket, semicolon, do, space, LS, space, minus AL, and then the name of the
+file you're trying to monitor, semicolon, sleep, space, five, semicolon, done, and when
+you enter that, it'll check to see if x is equal to x, and surprise, surprise, it is,
+you run your LS command on the file that you're monitoring, it'll wait for five seconds
+and it'll do it again, it'll print those off nicely and online.
+What you could always do, if you just want it on the top of the screen, is first put in
+a clear, and use the clear command, which will clear the screen, and then semicolon, and
+then LS, space, minus AL, space, sleep, and the rest of that.
+So that's that tip.
+Another thing I do from time to time is, you know, back up your home directory, for
+instance, now you can use this by using the tar command, so tar, space, minus C for
+create, V for verbose, and F for the file name, space, and then the file name, and then
+you copy it over where you were to where you went on tar, and then you go tar, space, minus
+x for extract, V for verbose, and F for file name, and then the name of the file again.
+Now you can do this in one line, so this is kind of handy when you want to copy, say,
+your home there to another partition, but you want to preserve the permissions and symbolic
+links, and that sort of thing.
+So what you can do is type tar, space, minus C, F, space, and the minus sign again, which
+means send the tar instead of to a file, send to standard input, space, and the dot, which
+means this directory, and then you fire it off to a pipe, and then the other side of
+the pipe you type, open bracket or parentheses, and then CD, space, and then the directory
+where you want to put it, so slash media slash backup disk, and then semicolon, and then
+tar, space, minus x, V, F, space, and the minus sign again, to take the tar extract from
+the standard input, and then close that with the closing parentheses.
+And that is a nice way to backup files from one location to another without those
+information.
+And it's also handy if you're copying files with spaces, or there's any weirdness within
+the directory structure, that's a tar pretty much as rock solid as far as copying files
+from one location to the other.
+Well all these things will be in the show notes of this episode, but I'll probably go into
+more detail on the blog posting that will accompany this episode on my own website,
+which is kenfallon.com, and if you have any of these one liners, feel free to do a little
+podcast about it, because some of these things I've got from colleagues at work, and they
+really have saved me a lot of time over the last few years, and I hope they do you for
+you also.
+Okay, as ever, there'll be somebody else coming to do an episode tomorrow, so until then,
+thank you very, very good thing.
+Thank you for listening to Hacquered Public Radio, HPR is sponsored by caro.net, so head
+on over to C-A-R-O-D-E-T for all of your needs.
+Hello, is there anyone there?
+This isn't Dave's house, there are windmills, tulips, and lots and lots of water, I'm scared,
+so Dave, where have you sent me?