Commands by mathias

Commands by mathias (5)

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Decode \x{ABCD}-style Unicode escape sequences

This is especially useful to get crazy stuff like space characters copied to your pasteboard correctly. Source: https://github.com/mathiasbynens/dotfiles/blob/master/.functions Show Sample Output
This is sample output - yours may be different.
```
$ unidecode "\x{1D306}"
&#119558;
$ unidecode "\x{00A9}\x{2122}\x{00AE}"
???
```
0

perl -e "binmode(STDOUT, ':utf8'); print \"$@\""; echo # newline

mathias · 2012-01-02 10:34:51 7
Convert seconds into minutes and seconds

This is a very simple way to input a large number of seconds and get a more useful value in minutes and seconds. Avoids useless use of echo. Show Sample Output
This is sample output - yours may be different.
```
 04 59
```
26

bc <<< 'obase=60;299'

mathias · 2011-10-21 13:15:17 11
What is my IP address?
This is sample output - yours may be different.
-6

curl whatismyip.org

mathias · 2011-10-15 12:22:34 4
Get all links of a website

This will get all links from a given URL, remove any duplicates, and output the result.
This is sample output - yours may be different.
0

lynx -dump http://example.com/ | awk '/http/{print $2}' | sort -u

mathias · 2011-10-13 09:49:36 7
ROT13 using the tr command
This is sample output - yours may be different.
10

alias rot13="tr a-zA-Z n-za-mN-ZA-M"

mathias · 2011-03-17 11:21:19 5

What's this?

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Advanced python tracing

Trace python statement execution and syscalls invoked during that simultaneously

When was your OS installed?

ls only directories

Like normal ls, but only lists directories. Can be used with -l to get more details (ls -lad */)

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

A one-line web server in Ruby

Here's how to serve a directory in one line of Ruby. Handy for sharing files at a conference, for example.

Show number of NIC's, ports per nic and PCI address

Convert all WMF images to SVG recursively ignoring file extension case

This assumes you have the package installed necessary for converting WMF files. On my Ubuntu box, this is libwmf-bin. I used this command, as libwmf is not on my wife's iMac, so I archived the directories containing the WMF files from OS X, ran them on my Ubuntu box, archived the resulting SVGs, and sent them back to her. Quick, simple and to the point. Searches directories recursively looking for extensions ignoring case. This is much more readable and clean than -exec for find. The while loop also gives further flexibility on complex logic. Also, although there is 'wmf2svg --auto', it expects lowercase extensions, and not uppercase. Because I want to ignore case, I need to use the -o option instead. Works in ZSH and BASH. Haven't tested in other shells.

bash/ksh function: given a file, cd to the directory it lives

fcd : file change directory A bash function that takes a fully qualified file path and cd's into the directory where it lives. Useful on the commadline when you have a file name in a variable and you'd like to cd to the directory to RCS check it in or look at other files associated with it. Will run on any ksh, bash, likely sh, maybe zsh.

Resample a WAV file with sox

Change the sample rate with sox, the swiss army knife of sound processing.

Get a diff of two json arrays

jq is amazing for manipulating json on the commandline, but the developers have some weird ideas about how to handle shell redirections. This command works around them. Further reading: https://github.com/stedolan/jq/issues/1110

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