ranguli / cheats

A collection of useful commands I've come to use often.

cheats

A collection of useful commands I've come to use often.

Table of Contents

• SSH
• Hugo
• GPG
• Docker
• aws-vault
• Linux
• wget
• Git
• Gentoo

SSH

Regenerating a public key from a private key

chmod 400 ~/.ssh/id_rsa # If you haven't done so already
ssh-keygen -y -f ~/.ssh/id_rsa > ~/.ssh/id_rsa.pub

Hugo

Getting up and running from a new machine

git clone [e-mail]:ranguli/blog.joshmurphy.ca
cd blog.joshmurphy.ca
hugo server -D

GPG

Importing a private/public key pair

gpg --import private.key
gpg --import public.key

List imported GPG keys (with key ID)

gpg --list-keys --keyid-format long

Trusting a GPG key after importing it from one machine to another

gpg --edit-key <KEY_ID>
gpg> trust

Docker

Get a bash shell for a running container

docker exec -it CONTAINER_ID /bin/sh

aws-vault

Add a new profile (after initializing the password store) Note: pass is fussy with GPG keys, so if you need it to 'just work', uninstall pass, and remove ~/.password_store to force aws-vault to use its default 'encrypted file' backend.

aws-vault add profilename

A great example from the aws-vault repo illustrating just how convenient a tool it is.

$ aws-vault exec home -- env | grep AWS
AWS_VAULT=home
AWS_REGION=us-east-1
AWS_ACCESS_KEY_ID=%%%
AWS_SECRET_ACCESS_KEY=%%%
AWS_SESSION_TOKEN=%%%
AWS_SECURITY_TOKEN=%%%

Linux

Find a network printer even if it isn't installed

systemctl start avahi-daemon && avahi-browse -a | grep Printer

Copy the contents of a text file into your clipboard

xclip -sel c < file.txt

wget

Downloading multiples files

# Add our URLs in to a file list. Makes a nice backup/manifest too.
(
echo www.urlfromclipboard.com/1
echo www.urlfromclipboard.com/2
echo www.urlfromclipboard.com/3
)>"shoppinglist.txt"
pause

# Point wget to our URL list
wget -i shoppinglist.txt

Git

Take an outdated branch and force it to be up to date with a new one (for when you don't care about any of the changes in the out of date branch and don't want to delete a branch just for the sake of recreating an up to date branch of the same name.)

git push origin --force newbranch:outofdatebranch

Create a branch locally and remotely

git fetch && checkout -b branch && git push origin branch

Remove a branch locally and remotely

git branch -d branch && git push origin -d branch

Completely reset a local repo without having to reclone

git fetch origin && git reset --hard origin/master && git clean -f -d
git checkout mybranch && git pull && git clean -f -d # Optionally checkout a clean version of the branch

Add a submodule to your repository (in future, clone this repo with --recursive).

git submodule add https://github.com/chaconinc/DbConnector
git submodule init
git submodule update

Syncing submodules if you forgot to clone using --recursive. You can setup the submodules without recloning

git submodule init
git submodule update

Keeping a fork up to date

# First add the fork as upstream
git remote add upstream https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY.git
git remote -v # Verify it worked
git merge upstream/master # Then merge it

Comparing a local file to it's remote counterpart:

git fetch origin master # Make sure you have fetched the details from remote
git diff FETCH_HEAD -- yourfile.py # Compare your two files

Gentoo

Updating a Gentoo system

#!/bin/sh
echo "Run as root!"
emerge --sync
emerge -avuDN --with-bdeps=y @world
etc-update
emerge -pv --depclean
revdep-rebuild
eclean -d distfiles