Online openssl private certificate and key with alternative DNS

Openssl added a nice alternative to the config file or extention to create requests with alternative DNS. This will create a key and certificate (not certificate request) with two additional DNS alt1.example.net and alt2.example.net

sudo openssl req -x509 -nodes -days 3650 -newkey rsa:4096 -keyout mykey.key -out mycer.crt  -subj '/CN=main.example.net' -addext 'subjectAltName=DNS:alt1.example.net,DNS:alt2.example.net'

URL - safe and unsafe characters

RFC - http://www.rfc-editor.org/rfc/rfc1738.txt

"Unsafe characters"
	Why:	Some characters present the possibility of being misunderstood within URLs for various reasons. These characters should also always be encoded.
	Characters:	Character Code Points (Hex) Code Points (Dec) Why encode? Space 20 32 Significant sequences of spaces may be lost in some uses (especially multiple spaces) Quotation marks 'Less Than' symbol ("<") 'Greater Than' symbol (">") 22 3C 3E 34 60 62 These characters are often used to delimit URLs in plain text. 'Pound' character ("#") 23 35 This is used in URLs to indicate where a fragment identifier (bookmarks/anchors in HTML) begins. Percent character ("%") 25 37 This is used to URL encode/escape other characters, so it should itself also be encoded. Misc. characters:    Left Curly Brace ("{")    Right Curly Brace ("}")    Vertical Bar/Pipe ("|")    Backslash ("\")    Caret ("^")    Tilde ("~")    Left Square Bracket ("[")    Right Square Bracket ("]")    Grave Accent ("`") 7B 7D 7C 5C 5E 7E 5B 5D 60 123 125 124 92 94 126 91 93 96 Some systems can possibly modify these characters.

"Reserved characters"
	Why:	URLs use some characters for special use in defining their syntax. When these characters are not used in their special role inside a URL, they need to be encoded.
	Characters:	Character Code Points (Hex) Code Points (Dec)  Dollar ("$")  Ampersand ("&")  Plus ("+")  Comma (",")  Forward slash/Virgule ("/")  Colon (":")  Semi-colon (";")  Equals ("=")  Question mark ("?")  'At' symbol ("@") 24 26 2B 2C 2F 3A 3B 3D 3F 40 36 38 43 44 47 58 59 61 63 64

Disable at runtime selinux

There are times when you need to test something quick and selinux is in your way ... what do you do then ?
Instead of going with a full reboot you can just do the following

echo 0 > /selinux/enforce

This will disable the selinux at runtime. If the system is configured with selinux enabled into his config file
(on redhat/centos /etc/sysconfig/selinux ) next time you reboot it will be enable.

To enable at runtime

echo 1 > /selinux/enforce