Package Management

Command	Description	Example
Debian/Ubuntu
apt update	Update package index.	sudo apt update → Refreshes the list of available packages.
apt upgrade	Upgrade installed packages.	sudo apt upgrade → Installs updates for all installed packages.
apt install [pkg]	Install a package.	sudo apt install nginx → Installs the nginx package.
apt remove [pkg]	Remove a package.	sudo apt remove nginx → Removes the nginx package.
RedHat/CentOS
yum update	Update package index.	sudo yum update → Refreshes the list of available packages.
yum install [pkg]	Install a package.	sudo yum install httpd → Installs the httpd package.
yum remove [pkg]	Remove a package.	sudo yum remove httpd → Removes the httpd package.