KevCui

#!/usr/bin/env bash
# HOW TO USE:
# ~$ chmod +x jwtDecoder.sh
# ~$ ./jwtDecoder.sh "<JWT token>"

padding() {
    # $1: base64 string
    local m p=""
    m=$(( ${#1} % 4 ))
    [[ "$m" == 2 ]] && p="=="

Kartones

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)