Uly.me

cloud engineer

prompt

Remove Sudo Password

Removing sudo password is typically not a good practice. If you’re a seasoned system administrator, or you’re the only one using your own desktop, being prompted for a sudo password can get really annoying. Here’s how to stop getting prompted every time you run sudo.

Run visudo. 

sudo visudo

Edit the sudo line and set to below.

%sudo ALL=(ALL) NOPASSWD: ALL

Save file.

GitBash .bashrc

Here’s how to find your GitBash .bashrc.

# cd takes you to gitbash home
cd 
# edit .bashrc
vim ~/.bashrc

You can add aliases, change prompt styles, etc.

export PS1="\w: $ "
alias gcloud="gcloud.cmd"
alias gsutil="gsutil.cmd"
alias code="cd ~/Code"
cd Code

Disable Host Key Checking

How to suppress typing “yes” when prompted by ssh.

#!/bin/bash
ssh-keygen -f "/home/user/.ssh/known_hosts" -R "yourdomain.com" 
ssh -o "StrictHostKeyChecking=no" -i "keys/key.pem" ubuntu@domain.com

  1. First remove old keys in the know_hosts file.
  2. Use “StrictHostKeyChecking” to suppress prompt.

Linux Prompt

Here’s my favorite Linux prompt.

PS1='\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '

Add to end of your .bashrc to make it permanent.

Styling The Bash Prompt

Great article how to style your Bash prompt. Make sure you are using Bash shell, because you could be using another shell. Use this to display your current shell. Just type “bash” to start using Bash shell.

echo $0
bash

I use the prompt style below. See the result underneath PS1. You may have to exit and re-enter your Terminal to see results.

PS1="\u@\h:\w: "
ulysses@localhost:/var/www: