Alexis La Porte aklap

How to check file integrity with shasum

For verifying the integrity (but not authenticity of data, i.e., who authored it or the origin of the file) of a file, it is necessary to run a checksum function on the file which will output a value and compare it to a previously stored checksum value; if both values match, we can be relatively confident that the file hasn't been tampered with or altered.

You might be asked to verify a file's sha1sum or sha2sum–-all this means is calculating and verifying the cryptographic sha1 or sha2 hash value or digest included in the file.

Various commands and methods for verifying shasum 1 or 2:

Organic:
In terminal run:

Bandit at overthewire.org

Levels 0-26. As of 5/24/16 there is no level 27.

Level 0

Login into remote server using ssh

Commandss:

Level 1

ls -la    
cd ./backup    
cat ./bookmarks-html | grep password

pw: rioGegei8m

Level 2

Resolving missing link to libcrypto openssl on OSX from: http://stackoverflow.com/questions/38670295/brew-refusing-to-link-openssl

brew update

brew install openssl

ln -s /usr/local/opt/openssl/lib/libcrypto.1.0.0.dylib /usr/local/lib/

ln -s /usr/local/opt/openssl/lib/libssl.1.0.0.dylib /usr/local/lib/

Pushing to Multiple Git Repos

If a project has to have multiple git repos (e.g. Bitbucket and Github) then it's better that they remain in sync.

Usually this would involve pushing each branch to each repo in turn, but actually Git allows pushing to multiple repos in one go.

If in doubt about what git is doing when you run these commands, just

Checklist for maintaining setup (MacOS)

MacOS

Apple Icon Software Update or run in command line: This command lists all updates for your v of MacOS

softwareupdate -l

This command lists installs all updates for you v of MacOS

Tabs and Windows

Function	Shortcut
Fullscreen	`⌘`+ `Enter`
Previous Tab	`⌘`+ `Left Arrow`
Next Tab	`⌘`+ `Right Arrow`
Go to Tab	`⌘` + `Number`
Go to Window	`⌘` + `Option` + `Number`
Go to Split Pane by Direction	`⌘` + `Option` + `Arrow`

READ BEFORE STARTING!

Before erasing and partitioning your Kobo always back up your SD card and make sure you have an image of your Kobo drive before beginning this process.

I no longer own a Kobo Glo and do not have any Kobo images. The best place to find help with Kobo images or a bricked device are the forums at https://www.mobileread.com/forums.

You will need:

Kobo Glo HD (or other Kobo model that uses microSD)

From Apple Stack Exchange

1. Download Ubuntu ISO

2. Insert flash drive. Reformat.

Open DiskUtility. Erase flash drive. Reformat as MS-DOS(FAT) with GUID partition.

3. Convert the ISO to .img

Run hdiutil convert -format UDRW -o /path/to/target.img /path/to/ubuntu.iso

	# Hello, and welcome to makefile basics.
	#
	# You will learn why `make` is so great, and why, despite its "weird" syntax,
	# it is actually a highly expressive, efficient, and powerful way to build
	# programs.
	#
	# Once you're done here, go to
	# http://www.gnu.org/software/make/manual/make.html
	# to learn SOOOO much more.