ggrandes

# Original Source:
# https://gist.github.com/ggrandes/a57c401f1bad6bd0ffd87a557b7b5790

# SIGN / VERIFY
openssl cms -sign -keyid -md sha256 -nodetach -binary -in /etc/passwd -signer user.crt -inkey user.key -out x.smime -outform SMIME
openssl cms -verify -CAfile ca.crt -in x.smime -inform SMIME

# ENCRYPT / DECRYPT
openssl cms -encrypt -keyid -aes-256-cbc -in /etc/passwd -binary -out x.smime -outform SMIME user.crt 
openssl cms -decrypt -in x.smime -inform SMIME -recip user.crt -inkey user.key 

ggrandes

Screen Cheatsheet / Quick Reference (Pocket Friendly)

Escape Key

All screen commands are prefixed by an escape key, by default Ctrl-a (that's Control-a, sometimes written ^a). To send a literal Ctrl-a to the programs in screen, use Ctrl-a a. This is useful when when working with screen within screen. For example Ctrl-a a n will move screen to a new window on the screen within screen.

Description	Command
Basic
Start a new session with session name	screen -S

ggrandes

/*	HTMLDocumentEditor.java
 *	@author: Charles Bell
 *	@version: May 27, 2002	
 */

import java.awt.*;
import java.awt.event.*;
import java.io.*;

import javax.swing.*;

ggrandes

Match: 0.0.0.0-255.255.255.255

Perl / PCRE

$input =~ /^(?:(25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)\.){3}(?1)$/;

grep -P '^(?:(25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)\.){3}(?1)$' <<<"$input"

ggrandes

#!/bin/bash
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

ggrandes

#!/bin/bash
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Original Source:
# https://gist.github.com/ggrandes/c1765904e804db15b8c57d90299d006f
#

ggrandes

#!/usr/bin/perl -wT
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

ggrandes

#!/bin/bash
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

ggrandes

#!/bin/bash
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

ggrandes

#!/bin/bash
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.