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How to sync time on CentOS

Install Network Time Service (ntp) & ntpdate clients:

How to search file by name in Linux

For this purpose you can use find command line tool.

How to search file for text in Linux

Name grep comes from “globally search for a regular expression and print matching lines“

How to use `screen` terminal multiplexer for Linux

Screen is a program which allows the user to run multiple preserved window session on a single machine. It’s commonly used for running long term procedures in the background by the detaching from the current running state without termination.

How to install SSH on Ubuntu