cloud engineer
by Ulysses
Services that user Security Groups
EC2-Classic instance
Amazon EC2 instances
ElasticCache
AWS Elastic Beanstalk
Amazon Elastic MapReduce
Amazon RDS (Relational Database Service)
Amazon Redshift
Amazon ElastiCache
Amazon CloudSearch
Elastic Load Balancing
Lambda
Fargate
EFS
by Ulysses
Netstat is a utility for gathering network statistics. It comes preinstalled on most systems.
If missing, here’s how to install.
# Redhat, CentOS yum install net-tools # Debian, Ubuntu, Mint apt install net-tools # SLES, SUSE zypper install net-tools |
# Redhat, CentOS yum install net-tools # Debian, Ubuntu, Mint apt install net-tools # SLES, SUSE zypper install net-tools
Here are some common and useful commands.
# show version netstat -v # show routing table netstat -nr # show network interface statistics netstat -ai # show network connections netstat -ant # show network services netstat -tulpn |
# show version netstat -v # show routing table netstat -nr # show network interface statistics netstat -ai # show network connections netstat -ant # show network services netstat -tulpn
by Ulysses
Here’s a side by side comparison of AWS vs. GCP, and AWS vs. Azure.
by Ulysses
Give Instances access to other cloud services using scopes.
gcloud alpha compute instances set-scopes instance-name \ --project project-name --zone us-central1-a \ --scopes=cloud-platform,cloud-source-repos,compute-rw,storage-rw |
gcloud alpha compute instances set-scopes instance-name \ --project project-name --zone us-central1-a \ --scopes=cloud-platform,cloud-source-repos,compute-rw,storage-rw
by Ulysses
Linux is quite stable, but there are times that you may have to restart an application or a service after a configuration change. For the change to take effect, a restart of a service is required. The good news is starting and stopping services in Linux are quite easy.
The old way.
# Starting and stopping MySQL $ sudo /etc/init.d/mysql start $ sudo /etc/init.d/mysql stop $ sudo /etc/init.d/mysql restart # Starting and stopping Apache $ sudo /etc/init.d/apache2 start $ sudo /etc/init.d/apache2 stop $ sudo /etc/init.d/apache2 restart # Starting and stopping the network $ sudo /etc/init.d/networking start $ sudo /etc/init.d/networking stop $ sudo /etc/init.d/networking restart |
# Starting and stopping MySQL $ sudo /etc/init.d/mysql start $ sudo /etc/init.d/mysql stop $ sudo /etc/init.d/mysql restart # Starting and stopping Apache $ sudo /etc/init.d/apache2 start $ sudo /etc/init.d/apache2 stop $ sudo /etc/init.d/apache2 restart # Starting and stopping the network $ sudo /etc/init.d/networking start $ sudo /etc/init.d/networking stop $ sudo /etc/init.d/networking restart
Via service for Debian|Ubuntu distros
# Starting and stopping MySQL $ sudo service mysql start $ sudo service mysql stop $ sudo service mysql restart # Starting and stopping Apache $ sudo service apache2 start $ sudo service apache2 stop $ sudo service apache2 restart # Starting and stopping the network $ sudo service networking start $ sudo service networking stop $ sudo service networking restart |
# Starting and stopping MySQL $ sudo service mysql start $ sudo service mysql stop $ sudo service mysql restart # Starting and stopping Apache $ sudo service apache2 start $ sudo service apache2 stop $ sudo service apache2 restart # Starting and stopping the network $ sudo service networking start $ sudo service networking stop $ sudo service networking restart
Via Systemctl for CentOS|Redhat distros
# Starting and stopping MySQL $ sudo systemctl start mysqld $ sudo systemctl stop mysqld $ sudo systemctl restart mysqld # Starting and stopping Apache $ sudo systemctl start httpd $ sudo systemctl stop httpd $ sudo systemctl restart httpd # Starting and stopping the network $ sudo systemctl start network $ sudo systemctl stop network $ sudo systemctl restart network |
# Starting and stopping MySQL $ sudo systemctl start mysqld $ sudo systemctl stop mysqld $ sudo systemctl restart mysqld # Starting and stopping Apache $ sudo systemctl start httpd $ sudo systemctl stop httpd $ sudo systemctl restart httpd # Starting and stopping the network $ sudo systemctl start network $ sudo systemctl stop network $ sudo systemctl restart network