CSF is very helpful to allow or deny certain IP address with port in your Linux server. Based on your require block or allowing IP address with Port.

VSFTPD is an open source for uploading files to a server. Its very fast and secure files transfer.

Opera browser is an open source and have powerful features. This help us stay online when your internet connection is slow.

Run level 3 is set to multi-user.target and run level 5 is set to graphical.target.

Systemctl tool is use to start, stop, restart, status basic services, also the functionality of both service and chkconfig.

Need to install firewalld in your system, run the following command as root access.

If you are using Dedicated server or Virtual private server, files or directories access,modify,changes,logs reports time based on your timezone settings.