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Alex Rutar alexrutar

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alexrutar / change_directory_search.md
Last active August 21, 2023 17:38
Change Directory with Search
View change_directory_search.md

Often, it is useful to jump to search for a directory and automatically change to it. By comining the fd and fzf tools, we can create a simple cd variant:

function fcd
    set --local base "$HOME"
    set --local target (fd --base-directory $base --type directory | fzf --query "$argv")
    cd $base/$target
end

Call with fcd $query where $query is an optional string to initialize the search.

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alexrutar / get_ssh_key_hash.md
Last active October 15, 2022 20:27
Get SSH Public Key Hash
View get_ssh_key_hash.md

To get the SHA256 hash of an existing public key, simply run

ssh-keygen -lvf path/to/key.pub

If you want the MD5 hash (or another supported format), run something like

ssh-keygen -lv -E MD5 -f path/to/key.pub
@alexrutar
alexrutar / git_pretty_log.md
Last active July 11, 2023 09:12
View git_pretty_log.md

You can quickly visualize your current git tree structure with

git log --graph --oneline --all
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alexrutar / fish_pipeline.md
Last active February 11, 2022 17:52
Applying a command to each line of STDIN in fish
View fish_pipeline.md

It's often useful to apply a command to each line of STDIN inside a pipeline. This is easy to do in fish:

ls | while read line; echo $line; end
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alexrutar / wait_example.md
Last active August 20, 2023 13:10
Execute functions in parallel, and wait for them to finish.
View wait_example.md

This is a short function demonstrating how to run a sequence of commands in parallel and wait for them to be completed before continuing

function test_sleep
    set -l pid_list
    for i in 1 4 2 5 3
        # execute the command and put it in the background
        fish --command "
            sleep $i
            echo \"Finished command $i!\"
 " &
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alexrutar / validate_html.md
Last active August 20, 2023 13:08
Validate HTML using the W3C API from the command line.
View validate_html.md

We can use httpie to make requests to the W3C validator. For example, to test the file index.html, run

https "https://validator.w3.org/nu/?out=gnu" @index.html "Content-Type: text/html; charset=utf-8" --print 'b'

and any errors or warnings will be printed to STDOUT. You can also get the error format in JSON by using the out=json syntax.

Another option which can be done locally is to use the python html5validator. For example, if all your files are in a directory called html, calling

@alexrutar
alexrutar / get_large_files.md
Last active July 11, 2023 09:14
Get the largest files in a directory in human-readable format.
View get_large_files.md

If you have a folder my/folder, you can run

du -h my/folder | sort -rh | head -n 10

to get a list of the 10 largest subfolders.

Explanation:

  • du -h: get the size of the elements in the folder in human-readable format
  • sort -rh: sort human-readable in reverse order (requires an updated version of sort)
  • head -n 10: only take the first 10 elements