How To Create a Sudo User On CentOS

The sudo command provides a mechanism for granting administrator privileges, ordinarily only available to the root user, to normal users. This guide will show you the easiest way to create a new user with sudo access on CentOS, without having to modify your server’s sudoers file. If you want to configure sudo for an existing […]

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How to Open a Port CentOS 7 Firewalld

Open Specific Port Opening a port in firewalld is fairly straightforward, in the below example we allow traffic in from any source IP address to TCP port 100. First we modify the persistent configuration, then we reload firewall-cmd to load this change into the running configuration. [root@centos7 ~]# firewall-cmd –permanent –add-port=100/tcp success # firewall-cmd –reload […]

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Password Security

Why do we need secure passwords When you think of a “hacker,” what do you picture? If you’re like most people, it’s probably some kind of hoodie-wearing miscreant with black fingernail polish, a laptop plastered with snarky stickers and an array of empty energy drink cans surrounding them. If you’re like me, you probably also […]

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