jaystile

View Markdown in Firefox

I want to see local markdown files in the Firefox browser formatted and displayed. I've discovered that Firefox is a real stickler for not displaying files unless they are of mimetype text/plain. Even if you install a markdown viewer extension, if you try to open a local file it was try and download the file instead.

To solve this, I had to configure the text/markdown mime type locally to be text/plain and then it worked fine.

Procedure

cp /etc/mime.types ~/.mime.types

jaystile

• git remote update origin --prune : Removes branches that have been removed at the origin
• git fetch && git log ..origin/master : See the incoming commits
• git fetch && git log origin/master.. : See the outgoing commits
• git diff <commithash> : See the changes since the commithash

Alias section (for .gitconfig)

[alias]
  br = branch
 co = checkout

jaystile

Comments

• //! crate level comment
• /// doc comment, supports markdown, testable code samples
• // code comment

Cargo

Docs

• cargo docs --open

Linting

• cargo clippy

jaystile

Debug!

Print out the all the information with the parameter expansions and replacements

set -x
mycommand "$myArgs"
set +x

Check for a command before using it in a script

jaystile

#!/bin/bash

# Write results to a tmp file and clean it up on exit
tmpfile=$(mktemp /tmp/batchRename.sh.XXXXXX)
cleanup() {
	rm "$tmpfile"
}
trap cleanup 0 1 2 3 6 

# Structure the name

jaystile

Get all the Subject Alternative Names for a host

When connecting to a server only the name that was requested is returned in the message. This will download the certificate and print all the Subject Alternative Names.

openssl s_client -connect 127.0.0.1:8443 </dev/null 2>/dev/null | openssl x509 -inform pem -text | grep -A1 "Subject Alternative Name"

jaystile

#!/bin/bash
# Template for importing one truststore into another which transfers all aliases and certs.
src_keystore=./srctruststore.jks
src_store_password='src_store_password'
dest_keystore=./dest_keystore.jks
dest_store_password='dest_store_password'
keytool -importkeystore -v -noprompt \
-srckeystore ${src_keystore} -srcstorepass ${src_store_password} \
-destkeystore ${dest_keystore} -deststorepass ${dest_store_password}  

jaystile

Copy a Secret from one namespace to another

# https://stackoverflow.com/questions/46297949/sharing-secret-across-namespaces/60627332#60627332
kubectl get secret <secret-name> -n <source-namespace> -o json | jq 'del(.metadata["namespace","creationTimestamp","resourceVersion","selfLink","uid"])' | kubectl apply -n <target-namespace> -f -

List all images in the cluster

kubectl get pods --all-namespaces -o=jsonpath='{range .items[*]}{"\n"}{.metadata.name}{":\t"}{range .spec.containers[*]}{.image}{", "}{end}{end}' |sort

jaystile

#!/bin/bash

# Check that an executable is available.
function check_prerequisite {
  local app=$1

  if ! which "$app"; then 
    echo "$1 not detected. Please, install and then continue"
    exit 1
  fi