Dev Cheat Sheets

git

# INIT A NEW REPO
git init
git add .
git commit -m "first commit"
git remote add origin git@github.com:<REPO>.git
git push -u origin master

# SECURITY ON GIT
Remove Sensitive Data: https://help.github.com/articles/remove-sensitive-data/
Sensitive information can include, but is not limited to:

    Passwords
    SSH keys
    AWS access keys
    API keys
    Credit card numbers
    PIN numbers

# CREATE TAG
git tag -a released/aug2016 4985bea -m "Tagging 4985bea365b32c4d3dbc024517f2bfa858a75a72"
git push origin --tags

# REMOVE TAG
git tag -d v1.6.0
git push origin :refs/tags/v1.6.0

# DELETE BRANCH
Local: git branch -d the_local_branch
Remote: git push origin :the_remote_branch

# UPDATE BRANCH INDEX
git remote update origin --prune

# MOVE BRANCH
git branch -m old_branch new_branch		# Rename branch locally    
git push origin :old_branch				# Delete the old branch    
git push --set-upstream origin new_branch     # Push the new branch, set local branch to track the new remote

or

git branch -m new_branch

# UNDO THE LAST COMMIT
git reset --soft HEAD~1

# UNDO THE LAST Nth COMMITS
git reset --soft HEAD~n

# UNDO THE LAST COMMIT AND CHANGES
git reset —hard HEAD~1

# BRANCHING:
CREATE A BRANCH: git branch feature
CHANGE TO A BRANCH: git checkout feature
CREATE AND CHANGE TO A BRANCH: git checkout -b feature
MERGE A BRANCH: git merge feature

# EXECUTABLE
git update-index --chmod=+x
git ls-files -s
git ls-tree {HEAD, FETCH_HEAD, ORIG_HEAD, master, origin/master, <branch>, origin/<branch>}

# CONFIG
git config --global http.proxy http://domainproxy:80
git config --global --unset http.proxy

[user]
	name = <NAME>
	email = <EMAIL>
[core]
	editor = vi
	excludesfile = /home/developer/.gitignore_global
[help]
	autocorrect = 1
[color]
	branch = auto
	diff = auto
	interactive = auto
	status = auto
[credential "https://github.com"]
	username = <USERNAME>
	helper = cache --timeout=3600

openssl-and-keytool

# Create Self-signed Certificates
openssl genrsa -des3 -passout pass:x -out server.pass.key 2048
openssl rsa -passin pass:x -in server.pass.key -out server.key
rm server.pass.key
openssl req -new -key server.key -out server.csr
openssl x509 -req -sha256 -days 365 -in server.csr -signkey server.key -out server.crt

# Update CA for OpenSSL
curl http://curl.haxx.se/ca/cacert.pem >/usr/local/etc/openssl/cert.pem
curl https://yourdomain.com/ca.pem >>/usr/local/etc/openssl/cert.pem

# Generate PEM, CRT and KEY
openssl pkcs12 -in cert.p12 -out cert.crt -clcerts -nokeys
openssl pkcs12 -in cert.p12 -out cert_chain.crt -nokeys
openssl pkcs12 -in cert.p12 -out cert.key -nocerts -nodes
openssl pkcs12 -in cert.p12 -out cert.pem -nodes

# Check a PKCS#12 keystore file (.pfx or .p12)
openssl pkcs12 -info -in keyStore.p12

# Check a private key
openssl rsa -check -in cert.key

# Check a PEM certificate
openssl x509 -text -noout -in cert.pem

# Check a JSK keystore file
keytool -list -v -keystore privateKey.store

# Check an SSL connection. All the certificates (including Intermediates) should be displayed
openssl s_client -connect <HOST>:<PORT>

# CRL
openssl crl -in /etc/crl/d897bec1.r0 -noout -text

# Import/Export keystores
keytool -importkeystore -srckeystore keystore.p12 -destkeystore keystore.jks -srcstoretype pkcs12

# Java Keystore (keytool)
https://www.sslshopper.com/article-most-common-java-keytool-keystore-commands.html

# How to create a trust store and import a certificate
keytool -genkey -dname "cn=name@example.com" -alias truststorekey -keyalg RSA -keystore ./client-truststore.jks -keypass changeit -storepass changeit
keytool -import -keystore ./client-truststore.jks -file ./cert.pem -alias devcert

# Runtime flags
-Djsse.enableSNIExtension=false -Djavax.net.ssl.trustStore=/path/to/trustore.jks -Djavax.net.ssl.trustStorePassword=<PASSWORD> -Djavax.net.ssl.keyStore=<KEYSTORE> -Djavax.net.ssl.keyStorePassword=<PASSWORD> -Djavax.net.ssl.keyStoreType=PKCS12