smussie

Gnupg Cheatsheet

Mon, 01 Jun 2020 00:00:00 +0000

—–[ GnuPG Cheatsheet ]—–

This document is intended to be a quick note about some GnuPG commands. I hope this will be useful as writing it was for me.

DEADBEEF is used as an example key ID, note any part of the user ID can be used as key specifier to identify a key.

The –output option can always be omitted.

Any output, keys, encrypted documents, and signatures, can be ASCII-armored by adding the –armor option.

GENERATE A KEYPAIR

$ gpg –full-gen-key

GENERATE A REVOKE CERTIFICATE

$ gpg –output revoke.gpg –gen-revoke DEADBEEF

LIST KEYS ON THE KEYRING

$ gpg –list-keys

EXPORT A PUBLIC KEY

$ gpg –output coffee.gpg –export DEADBEEF $ gpg –armor –export DEADBEEF

EXPORT A PRIVATE KEY

$ gpg –export-secret-keys DEADBEEF

IMPORT A KEY

$ gpg –import key.gpg

VALIDATE A PUBLIC KEY

A key is validated by verifying the key’s fingerprint and then signing the key, to certify that it is a valid key, and belongs to the correct user. Edit the key with

$ gpg –edit-key DEADBEEF

then you can view the fingerprint with

$ fpr

Now verify the fingerprint with the key owner, you must guarantee that you are communicating with the key’s true owner. After checking the fingerprint, you may sign the key to validate it

$ sign

You can list the signatures on the key with

$ check

DELETE A PUBLIC KEY

$ gpg –delete-key DEADBEEF

DELETE A PRIVATE KEY

$ gpg –delete-secret-key DEADBEEF

ASYMMETRIC ENCRYPTION AND DECRYPTION

$ gpg –output enc_doc.gpg –encrypt –recipient ax@crypt.coffee doc $ gpg –output doc –decrypt enc_doc.gpg

SYMMETRIC ENCRYPTION

With a passphrase.

$ gpg –output doc.gpg –symmetric doc.gpg

SIGN A DOCUMENT

A signature is created using the private key of the signer. Compress the doc before sign, output in binary format.

$ gpg –sign doc

CLEARSIGN A DOCUMENT

Wrapped in an ASCII-armored signature but otherwise human readable.

$ gpg –clearsign doc

DETACHED SIGNATURE

Creates a detached signature, in a separate file.

gpg [–armor] –detach-sig doc

EXTRACT A SIGNED DOCUMENT

$ gpg –decrypt doc.sig

VERIFY A SIGNED DOCUMET

$ gpg –verify doc.sig

Bash Cheatsheet

Mon, 01 Jun 2020 00:00:00 +0000

Customize Shell Prompt

Thu, 19 Sep 2019 00:00:00 +0000

Table for shell prompt

Sequence	Description	Sequence	Description
\d	The date (+%a\ %b\ %d format) 1)	\v	The version of the shell (short)
\D{format}	The date in the desired format (in strftime format) 2)	\w	The path of the working directory
\t	The time, 24-hour (+%k:%M:%S format) 3)	\W	The name of the working directory
\T	The time, 12-hour (+%l:%M:%S format) 4)	!	The current command number in the history
\@	The time, 12-hour, with AM/PM (+%l:%M\ %p format) 5)	#	The command number (from the start of the shell)
\A	The time, 24-hour (+%k:%M format) 6)	$	If the current user is root, displays a #, else displays a $
\h	The host name	[	Start a sequence of non-printing characters
\H	The full host name (with the domain name)	]	End a sequence of non-printing characters
\j	The number of suspended processes in the current shell (+Z)
\l	The name of the shell’s terminal device	\a ,\007	The bell character
\s	The name of the shell executable	\n	Start a new line
\u	The current user name	\r	Carriage return
\	A single backslash	\e ,\033	The Escape character. Used by some Control Sequences (see bellow)

Prompt Helper


username
@hostname:

~/Documents

$
PS1=""

Prompt Examples

For system wide change

/etc/profile
/etc/bashrc

For user based changes

~/.bash_profile ~/.bash_login ~/.profile ~/.bashrc ~/.bash_logout

Windows server 2019 config

Fri, 13 Sep 2019 00:00:00 +0000

- Installing windows server

1. Requirements

* after that

2. Virtual box config

3. Requirements

- Configuring

- Installing DNS and AD

- Configuring DNS and AD

Installing SynologyNas

Fri, 06 Sep 2019 00:00:00 +0000

Configuration Réseau DSM 6.2

Installsing SyslogNAS

Read the original post announced by jun: http://xpenology.com/forum/viewtopic.php?f=2&t=20216
Requirements
- Virtual Box
- Jun’s bootloader v1.03 (DSM 6.2) ds3617) (https://mega.nz/#F!yQpw0YTI!DQqIzUCG2RbBtQ6YieScWg!OZw2QKwT) ! Here what i got was all in .img file thus i did this to convert them to .vmdk VBoxManage convertfromraw imagefile.img vmdkname.vmdk \-\-format VMDK (https://xpenology.club/download/) * Unzip the package. We will need 2 files: synoboot.img and synoboot.vmdk
```
		* What is downloaded is mostly \*.img format so we need this additional steps for vm
				```
  				sudo apt-get install ccd2iso
  				ccd2iso <filename>.img <filename>.iso
				```
		* Optionally
				```
  				mount -o loop <img file name> <mountpoint>
  				mkisofs -o <iso output file name> <mountpoint>
				```
```
- Synology’s DSM : https://archive.synology.com/download/DSM/release/6.2/23739/.pat ?? It is the software that will be installed on the hardisk
- Synology’s DS Assistant : https://gloabl.download.synology.com/download/Tools/Assistant/ https://www.synology.com/en-global/support/download/DS3617xs#utilities
Configure the Virtual Machine:
- Type: Linux
- Version : Linux 2.6 / 3.x / 4.x (64-bit)
- Chipset : ICH9
- HDD Virtuel (4x) (Does it have to be SCSI or SATA???) _ Type de fichier HDD : VDI (VirtualBox Disk Image) _ Allocation dynamique du fichier VDI. _ Nom du fichier : VM-DSM-HDDx (x = numéro du disque dur) _ Taille : 8Gb * Remove Controller: IDE
- Number of CPUs: 2
- Network _ Set to Bridged Adapter _ Promiscuous-Mode: Allow all * MAC Address: 0011322CA785

4) Setup the network: a) Bridge or NAT, it’s up to you b) Expand the Advanced option c) Adapter type: Intel PRO/1000 MT Desktop (8254OEM) d) MAC Address: 0011322CA785 (This is the most important setting to make your Xpenology accesssible!) _ For class the teacher changed this to … _ Dans l’adresse MAC indiquez : 001132123456 (important !). Why is it very important?? and why is it different?

5) Start the VM, press F12 to enable the boot menu

Boot from IDE harddisk 1
In the gnub menu, select the last option (xxx VMware xxx)

(http://find.synology.com)
Wait around 2~5 minutes, depends on your Hardware spec. The bootloader only show around 10 lines of message. Don’t worry. Be patient and it’s still loading the system. ~~I am having most difficulty with this step right now~~
Install synology assistant. Press Search button
You should see your new DiskStation now. If not, wait for another 1 or 2 minutes
The most important step! Verify the MAC address shown in the Synology Assistant. Make sure it’s the same as the one you set in step 4.3d above.
Here you go, do what you usually do to a Synology system to install the DSM.

Tuto

<https://xpenology.com/forum/topic/6927-tutorial-install-6x-on-oracle-virtualbox-juns-loader>
<https://xpenology.com/forum/topic/13333-tutorialreference-6x-loaders-and-platforms>

Managing SWAP File

Thu, 27 Jun 2019 00:00:00 +0000

Create New SWAP

Step 1: Deactivate and Remove SWAP if there is one already

Step 2: Remove SWAP file

$ rm -r /swapfile

Step 3:

$ dd if=/dev/zero of=/swap bs=1024 count=1024k

$ mkswap /swap

$ chmod 600 /swap

$ chown root:root /swap

$ swapon /swap

$ echo "10" > /proc/sys/vm/swappiness

$ echo "vm.swappiness = 10" >> /etc/sysctl.conf

$ echo "/swap none swap sw 0 0 " >> /etc/fstab #Danger: check if the swap file is alread in fstab before doing this

Increase the SWAP file

Step 1: Deactivate SWAP

$ sudo swapoff -a

Step 2: Increase the size of the swap file, here for 16GB for example:

$ sudo dd if=/dev/zero of=/swapfile bs=1G count=16

Step 3: Make the SWAP file and turn on SWAP

$ sudo mkswap /swapfile

$ sudo swapon /swapfile

Step 4: To check the current SWAP size

$ grep SwapTotal /proc/meminfo

Removing SWAP file

Step 1: Deactivate SWAP

$ sudo swapoff -v /swapfile

$ sudo swapoff -a

Step 2: Remove swap file entry from /etc/fstab

/swapfile swap swap defaults 0 0

Step 3: Remove or Delete the actual swap file

$ sudo rm /swapfile

Welcome

Wed, 26 Jun 2019 00:00:00 +0000

For Batch

Welcome to my world, this is my first test blog or post or whatever.

SANS Cyber Acces Online Tutorials
- https://tutorials.cyberaces.org/tutorials.html
EDX

https://www.edx.org/micromasters/ritx-cybersecurity
Cybrary

https://www.cybrary.it/
SecurityTube

http://www.securitytube.net/
another thing but small tutorials

Guardicore

https://www.pentesteracademy.com Ref: [logo]: https://ahkhaicom.files.wordpress.com/2016/02/vm131.png?w=474 “logo2”