Merge branch 'dev' into vhs
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89ec9614e5
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basics/yes.md
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24
basics/yes.md
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---
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title: "yes"
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tags: [ "basics" ]
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---
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# The Best Linux Program: `yes`
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The program `yes` prints the word `yes` to your terminal until you cancel it, perhaps with 'Control + c'.
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Or technically it prints `yes\n`, meaning `yes` and then a new line (like pressing the Return key).
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This is extremely powerful.
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If you ever want to automatically install something which persistently nags you with `do you want to do the thing? [y/N]?`, then you can just pipe `yes` into that program, and it will answer 'yes' to all questions.
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```bash
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yes | $INSTALL_SCRIPT_FILE.sh
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```
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This works best for disposable systems, like VMs or containers.
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Try this on a live system, and you might find out that you should have read that message fully.
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```bash
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yes | yay
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```
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33
distros/void/Brand_Name_Wallpaper.md
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distros/void/Brand_Name_Wallpaper.md
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---
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title: "Brand Name Wallpaper"
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tags: [ "void" ]
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---
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To automatically stick the logo onto your background, do these commands in the directory.
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Get the void linux logo from wikipedia
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```bash
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wget https://upload.wikimedia.org/wikipedia/commons/thumb/0/02/Void_Linux_logo.svg/256px-Void_Linux_logo.svg.png?20170131170632
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```
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Rename it, and resize it (the standard size is too small for most wallpapers)
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```bash
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convert -resize 200% '256px-Void_Linux_logo.svg.png?20170131170632' void-logo.png
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```
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Download a pretty wallpaper
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```bash
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wget http://wallpapercave.com/wp/Wlm9Gv0.jpg
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```
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Put the void logo on all *jpg and *png images
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```bash
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for x in *.jpg
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do
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composite -compose multiply -gravity Center void-logo.png "$x" "$x"
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done
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```
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@ -12,6 +12,11 @@ See changes in a directory, as it changes:
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`watch -d ls *directory*`
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Or use the `-g` flag to exit once the output changes.
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This command will look at whether you're connected to the internet, and turn into a rainbow once the connection hits.
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> watch -g ip address && clear && ip address | lolcat
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## Automatic Renaming
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There are a bunch of files:
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@ -34,17 +39,19 @@ done
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IFS is the field separator. This is required to denote the different files as marked by a new line, and not the spaces.
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(Alternatively, just install `renameutils` and do `rename Column Alice *`)
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## Arguments and Input
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The `rm' program takes arguments, but not `stdin' from a keyboard, and therefore programs cannot pipe results into rm.
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That said, we can sometimes pipe into rm with `xargs rm' to turn the stdin into an argument. For example, if we have a list of files called `list.txt' then we could use cat as so:
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To fix this, use `xargs` to turn the stdin into an argument.
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For example, if we have a list of files called `list.txt' then we could use cat as so:
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```bash
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cat list.txt | xargs rm
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```
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... *However*, this wouldn't work if spaces were included, as rm would take everything literally.
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Of course if spaces are included in the file, you would have to account for that.
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## Numbers
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@ -71,3 +78,22 @@ find . -type f -exec md5sum '{}' ';' | sort | uniq --all-repeated=separate -w 15
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```bash
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cat /dev/urandom | tr -cd [:alnum:] | dd bs=1 count=200 status=none && echo
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```
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## Temporary Working Directory
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Try something out in a random directory in `/tmp` so the files will be deleted when you next shut down.
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```bash
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mktemp -d
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```
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That gives you a random directory to mess about in.
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```bash
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dir=$(mktemp -d)
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for x in {A..Z}; do
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fortune > "$dir"/chimpan-$x
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done
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cd $dir
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```
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