How to Install Google Cloud SDK & Login to GCP (All Methods) ?

✅ How to Install Google Cloud SDK & Login to GCP (All Methods)

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🌟 Step 1 — Install Google Cloud SDK

Windows

Download installer:

https://cloud.google.com/sdk/docs/install

macOS

curl https://sdk.cloud.google.com | bash
exec -l $SHELL

Linux

curl -O https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-sdk-367.0.0-linux-x86_64.tar.gz
tar -xf google-cloud-sdk-367.0.0-linux-x86_64.tar.gz
./google-cloud-sdk/install.sh
exec -l $SHELL

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⚙️ Step 2 — Initialize Cloud SDK

gcloud init

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🔐 GCP Login Methods

✅ Method 1 — Login Using Browser

gcloud auth login

✅ Method 2 — Login Without Browser (SSH Server)

gcloud auth login --no-launch-browser

You will get a URL → open it → paste code.

✅ Method 3 — Set Default Project

gcloud config set project PROJECT_ID

✅ Method 4 — Verify Login

gcloud config list

🎯 Method 5 — Application Default Credentials (ADC)

Used by SDKs / Terraform / APIs

gcloud auth application-default login

🔐 Method 6 — Service Account Login (Automation / CI-CD)

gcloud auth activate-service-account --key-file=key.json
gcloud config set project PROJECT_ID

🛑 Method 7 — Workload Identity Federation (Keyless Login)

gcloud auth login --cred-file=workload-identity-credential.json

🧠 Method 8 — Cloud Shell Login (No Install)

Go to:

https://console.cloud.google.com

Click Activate Cloud Shell ✅

🧩 Method 9 — Terraform + GCP Authentication

gcloud auth application-default login

🔐 Method 10 — Docker / Artifact Registry Login

gcloud auth configure-docker

💻 Method 11 — Login to GCP Git Repos

gcloud source repos clone REPO_NAME --project=PROJECT_ID

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📌 Useful Commands

Action	Command
List projects	gcloud projects list
Show active auth	gcloud auth list
Remove login	gcloud auth revoke
Update SDK	gcloud components update

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✨ Mastering Bash Special Characters — The Real Power of Linux Terminal 🔥

🔥 Master Bash Special Characters — Power of Linux Terminal

If you work in Linux, DevOps, Cloud, Cyber Security, or Automation, Bash special characters are your superpower.

These symbols control execution, variables, redirection, scripting logic, and automation. Here is the complete cheat-sheet 👇

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✅ Basic Bash Symbols

Symbol	Meaning	Example
$	Variable / Command output	echo $HOME
#	Comment	# comment
*	Wildcard (match all)	*.txt
?	Match one character	file?.log
\	Escape character	echo \"hello\"
~	Home directory	cd ~

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✅ Command Execution Operators

Symbol	Meaning	Example
;	Run sequentially	cmd1; cmd2
&&	Run if previous success	build && deploy
||	Run if previous fails	cd logs || mkdir logs
&	Run in background	sleep 5 &

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✅ Pipes & Redirection

Symbol	Meaning	Example
|	Pipe output	ls | grep txt
>	Output to file (overwrite)	echo hi > file.txt
>>	Append to file	echo hi >> file.txt
<	Redirect input	sort < data.txt

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✅ Advanced Redirection

Symbol	Meaning	Example
<<	Heredoc	cat << EOF
<<<	Here-string	cat <<< "Hello"

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✅ Test & Grouping

Symbol	Meaning	Example
[ ]	Test	[ -f file.txt ]
[[ ]]	Advanced test	[[ $a == $b ]]
( )	Subshell	(cd /tmp && ls)
{ }	Command block	{ echo A; echo B; }

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✅ Brace Expansion

Pattern	Meaning	Example
{1..5}	Number range	echo {1..5}
{a,b}	List	mv f.{txt,backup}

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✅ Special Shell Variables

Variable	Meaning
$?	Last command status
$$	Process ID
$!	Last background PID
$@	All arguments
$#	Argument count

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🎯 Example Script

#!/bin/bash
if [[ -f "$1" ]]; then
  grep "error" "$1" >> logs.txt && echo "Logged ✅"
else
  echo "File not found ❌" && exit 1
fi

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