Useful shortcuts and Commands in Mac

Shift-Command-3 captures the entire screen, and Shift-Command-4 allows you to select a specific area

Working with the terminal

On a Mac, the SSH configuration file, config, is typically stored in your home directory within a folder named .ssh. The full path is usually ~/.ssh/config. You can also find global configuration settings in /etc/ssh/sshd_config.

In VSCode:

cd /
cd ~/.ssh/
open config
open known_hosts

Here’s a brief explanation of each command:

🧭 cd /

• Changes directory to the root of the filesystem.
• / is the top-level directory on Unix/Linux systems.

📁 cd ~/.ssh/

• Changes directory to the .ssh folder inside your home directory.
• ~ refers to your current user’s home (e.g., /home/username/).
• .ssh/ typically contains SSH-related files: keys, configs, and known hosts.

📝 open config

• Tries to open the config file inside .ssh/.
• This file stores SSH client settings, like:
  • Host aliases
  • Custom ports
  • Identity files (keys) for specific servers

On Linux, you’d typically use nano config, vim config, or cat config.
open is a macOS command that opens files with the default app.

🔐 open known_hosts

• Opens the known_hosts file.
• This file records fingerprints of SSH servers you’ve connected to.
• Helps SSH verify you’re connecting to the same server (prevents spoofing).