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NIP.IO - wildcard DNS for any IP Address
> Dead simple wildcard DNS for any IP Address

> NIP.IO maps <anything>.<IP Address>.nip.io to the corresponding <IP Address>, even 127.0.0.1.nip.io maps to 127.0.0.1
testing  service  ip  dns  dev  nip.io  address  wildcard  development  localhost 
4 weeks ago by jefftriplett
sslip.io
sslip.io is a DNS (Domain Name System) service that, when queried with a hostname with an embedded IP address, returns that IP Address. It was inspired by and uses much of the code of xip.io, which was created by Sam Stephenson.
sslip  wildcard  dns  service  programming  tool 
4 weeks ago by vicchow
sh - Check if a file exists with wildcard in shell script - Stack Overflow | https://stackoverflow.com/
You can do the following:
<code class="language-bash">
set -- xorg-x11-fonts*
if [ -f "$1" ]; then
printf "BLAH"
fi
</code>

This works with sh and derivates: ksh and bash. It doesn't create any sub-shell. $(..)and `...` commands create a sub-shell : they fork a process, and they are inefficient. Of course it works with several files, and this solution can be the fastest, or second to the fastest one.

It works too when there's no matches. There isn't need to use nullglob as one of the comentatators say. $1 will contain the origintal test name, therefore the test -f $1 won't success, because the $1 file doesn't exist.
bash  glob  wildcard  pitfall  gotcha  workaround  solution 
6 weeks ago by kme
bash - Remove files which not named "today.md" - Unix & Linux Stack Exchange | https://unix.stackexchange.com/
Use a negative match (requires shopt -s extglob, but possibly already set):
<code class="language-bash">
rm !(today).md
</code>

(you can first use ls instead of rm to check the result).

Lots of power in extglob, you could also do
<code class="language-bash">
rm !(yesterday|today).md
</code>

if you wanted to spare two files.
bash  shellscripting  wildcard  globs  filemanagement  tipsandtricks 
8 weeks ago by kme

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