Category Archives: My Linux

curl to show public ip in Linux terminal

curl ifconfig.me

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Reset Forgotten User Password on Ubuntu 16.04 | 17.10 | 18.04

To reset a user or root password, turn on the desktop or server and begin pressing the Esc key or Shift on your keyboard as soon as turn push the power button… to display Ubuntu boot menu. If your timing is … Continue reading

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command renewal letsencrypt every 3 months

sudo certbot renew –preferred-challenges http-01

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How To Secure Apache with Let’s Encrypt on CentOS 7

Step 1 — Installing the Certbot Let’s Encrypt Client To use Let’s Encrypt to obtain an SSL certificate, you first need to install Certbot and mod_ssl, an Apache module that provides support for SSL v3 encryption. The certbot package is … Continue reading

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disable and enable firewall on centos

sudo systemctl disable firewalld sudo systemctl enable firewalld

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