cloud engineer
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 -pnltu |
# show version netstat -v # show routing table netstat -nr # show network interface statistics netstat -ai # show network connections netstat -ant # show network services netstat -pnltu
Here’s a side by side comparison of AWS vs. GCP, and AWS vs. Azure.
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
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