How to update the operating system of a Linux cloud server

Before updating the system, especially if it has not been updated for a long time, please make a backup to avoid system damage and unusability. It is also recommended to stop running applications such as websites and databases first. System updates also require a certain amount of hard drive space. If the hard drive is full, please clean the hard drive or upgrade first. It is recommended to reserve at least 500MB of space for upgrades.

CentOS

Install EPEL sources to provide additional software sources for the system:

yum install epel-release -y

Install updates and restart the operating system:

yum update -y
reboot

Note: CentOS cannot Implement updates across major versions, such as directly upgrading from CentOS 6 to CentOS 7.

Ubuntu/Debian

Get available updates:

apt-get update -y

Install updates and restart the operating system:

apt-get upgrade -y
apt-get dist-upgrade -y
reboot

View system version:

lsb_release -r

Clean up unnecessary packages:

apt-get autoremove --purge

FreeBSD

Get available updates:

freebsd-update fetch

Install updates and restart the operating system:

freebsd-update install
reboot

View system version :

freebsd-version

System updates take a certain amount of time, ranging from a few minutes to a few hours, depending on the download speed and the number of software packages. Do not interrupt the system update, otherwise it will damage the operating system and render it unusable.

The above is the detailed content of How to update the operating system of a Linux cloud server. For more information, please follow other related articles on the PHP Chinese website!