Cloud commands

SSH Key Generation

ssh-keygen -b 2048 -f <key>.pem -m PEM -t rsa

Change Permission of SSH Key File

chmod 600 <key>.pem

Connecting to Cloud With SSH

ssh -i ./cloud-key -o PubKeyAcceptedAlgorithms=+ssh-rsa username@hostname

• If server does not allow ssh-rsa, add -o PubKeyAcceptedAlgorithms=+ssh-rsa

ssh -i ./cloud-key -o PubKeyAcceptedAlgorithms=+ssh-rsa username@hostname

Change Linux User Password

passwd

Upload file to Remote Server

scp -i <ssh-key> <file-to-upload> <username>@<host>:<path>

Compress folder with LZ4

tar --use-compress-program=lz4 -cf <file-name>.tar.lz4 <folder-name>/

Decompress folder with LZ4

tar --use-compress-program=lz4 -xf <file-name>.tar.lz4

GCP

• Reference: https://docs.cloud.google.com/sdk/docs/cheatsheet
• x86_64: N2D, T2D
• aarch64: C4A

Login related

• Login

gcloud auth login

• List logged-in accounts

gcloud auth list

• Logout

gcloud auth revoke <ACCOUNT>

Project related

• List existing projects

gcloud projects list

• Check selected project

gcloud config get project

• Change selected project

gcloud config set project <PROJECT_ID>

SSH connection

• Check existing instances

gcloud compute instances list

• Connect to instance

gcloud compute ssh <NAME>@<INSTANCE_NAME> --zone=<ZONE>

• Disconnect SSH connection

exit

• Add SSH login credential to $HOME/.ssh/config

gcloud compute config-ssh

Instance

• Boot instance

gcloud compute instances start <INSTANCE_NAME>

• Shutdown instance

gcloud compute instances stop <INSTANCE_NAME>

• Reboot instance

gcloud compute instances reset <INSTANCE_NAME>

AWS

Upload file from EC2 to S3

aws s3 cp <file> s3://<bucket>/<folder>/<file>

Download file from S3 to EC2

aws s3 cp s3://<bucket>/<folder>/<file> .