Psql is a command-line interface for interacting with PostgreSQL, a powerful and open source relational database system. Brew is a package manager for macOS that makes it easy to install and manage software. Here are the steps to install psql with brew:

• First, install the brew package manager if you don’t have it already. You can do this by running the following command in your terminal:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

• Second, update brew by running the following commands:

brew doctor
brew update

• Third, install libpq by running the command:

brew install libpq

Libpq is a library that contains psql and other PostgreSQL client utilities.

If you get an error of the type Error: Cask 'hex-fiend-beta' definition is invalid: invalid 'depends_on macos' value: ":lion", where hex-fiend-beta can be any cask name, and :lion any macOS release name, run the following command:

/usr/bin/find "$(brew --prefix)/Caskroom/"*'/.metadata' -type f -name '*.rb' -print0 | /usr/bin/xargs -0 /usr/bin/perl -i -pe 's/depends_on macos: \[.*?\]//gsm;s/depends_on macos: .*//g'

This will remove all depends_on macos references of installed casks.

Run the following command in the terminal:

dig +short myip.opendns.com @resolver1.opendns.com

Error:

xcrun: error: active developer path ("/Applications/Xcode.app/Contents/Developer") does not exist
Use sudo xcode-select --switch path/to/Xcode.app to specify the Xcode that you wish to use for command line developer tools, or use xcode-select --install to install the standalone command line developer tools.
See man xcode-select for more details.
xcrun: error: active developer path ("/Applications/Xcode.app/Contents/Developer") does not exist
Use sudo xcode-select --switch path/to/Xcode.app to specify the Xcode that you wish to use for command line developer tools, or use xcode-select --install to install the standalone command line developer tools.
See man xcode-select for more details.

Introduction#

SSHPass is a nifty little tool that lets you automate SSH login by bypassing the usual password prompt. While it’s super convenient for scripting, bear in mind that it’s not ideal for a multi-user setup due to security concerns. However, if you’re using it on your personal development machine, it’s pretty harmless.

How to Install SSHPass on Ubuntu#

Installing SSHPass on Ubuntu is as straightforward as it gets. All you need to do is open up your terminal and run the following command: