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Recently, I had a learning experience with cron jobs and acme.sh. acme.sh is an excellent tool that simplifies the management of Let's Encrypt TLS (SSL) certificates. It makes obtaining and renewing these essential security certificates for your web server easier.
Recently, I moved my server from Linode to AWS, which was a new environment for me. Initially, everything appeared to be working correctly, and I assumed everything was running smoothly. However, I forgot to migrate the cron job that acme.sh uses to renew the certificate automatically.
This oversight caused my Let's Encrypt certificates to expire, resulting in security warnings and potential disruptions for visitors to my website. Opps!
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The post How to add cron job entry for acme.sh appeared first on nixCraft.
When you download Debian Linux CD or DVD images, you must verify the authenticity of Debian Linux CD or DVD images using the gpg and sha512sum command. There are three files you will find here for Debian 12 AMD64 Architecture (download those files using the wget command or use the curl command to download file):
$ wget https://cdimage.debian.org/debian-cd/current/amd64/iso-dvd/debian-12.5.0-amd64-DVD-1.iso \
https://cdimage.debian.org/debian-cd/current/amd64/iso-dvd/SHA512SUMS \
https://cdimage.debian.org/debian-cd/current/amd64/iso-dvd/SHA512SUMS.sign
Now you have three files as follows:
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{vivek@desktop:~}$ ls -l-rw-rw-r-- 1 vivek vivek 3992977408 Feb 10 19:17 debian-12.5.0-amd64-DVD-1.iso
-rw-rw-r-- 1 vivek vivek 3372 Feb 10 22:11 SHA512SUMS
-rw-rw-r-- 1 vivek vivek 833 Feb 11 01:43 SHA512SUMS.sign
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WireGuard is an open-source, free, modern, and fast VPN with state-of-the-art cryptography. It is like OpenSSH in simplicity and uses private and public keys. Hence, it is more straightforward as compared to IPSec and OpenVPN. Initially released for the Linux kernel, it works with other operating systems. This page explains how to install and set up WireGuard VPN on Amazon Linux EC2 or Lightsail server.
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How do I check the TLS/SSL certificate expiration date from my Linux or Unix shell prompt? How can I find the TLS certificate expiry date from Linux and Unix shell scripts?
The post How to check TLS/SSL certificate expiration date from command-line appeared first on nixCraft.
How do I get a wildcard TLS/SSL certificate from Let’s Encrypt using acme.sh and AWS Route53? How can I set up wildcard Let’s Encrypt SSL with AWS Route53 for Nginx or Apache?
The post Route 53 Let’s Encrypt wildcard certificate with acme.sh appeared first on nixCraft.
When I install s3cmd package on my FreeBSD system and try to use the s3cmd command I get the following error:
ERROR: Test failed: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1091)
How do I fix this problem on FreeBSD Unix system?
The post ERROR: Test failed: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1091) appeared first on nixCraft.
I read your Let's Encrypt TLS/SSL certificate acme.sh tutorial. But, I need to set up and use Cloudflare DNS with acme.sh. How do I secure my Nginx web server with Let's Encrypt TLS/SSL certificate issue with Cloudflare DNS?
The post How to issue Let’s Encrypt wildcard certificate with acme.sh and Cloudflare DNS appeared first on nixCraft.
Let's Encrypt is a free, automated, and open certificate authority for your website, email server, database server and more. This page shows how to use Let's Encrypt to install certificate for Nginx web server get SSL labs A+ score on an OpenSUSE Linux version 15.1 or 15.2
The post How to secure Nginx with Let’s Encrypt on OpenSUSE 15.1/15.2 appeared first on nixCraft.
How do I create a new MySQL user and grant permissions in AWS RDS cloud service from the Linux command line?
The post How to create MySQL user and grant permissions in AWS RDS appeared first on nixCraft.
How do I secure Apache with mod_md Let's Encrypt on Ubuntu 20.04 and obtain a free TLS/SSL certificate? How do I secure Apache 2 with Let's Encrypt on Ubuntu 20.04 LTS server?
The post How To Secure Apache with mod_md Let’s Encrypt on Ubuntu 20.04 LTS appeared first on nixCraft.
How do I forcefully renew the Letsencrypt certificate on an Ubuntu, Debian, CentOS, RHEL, Fedora, or FreeBSD Unix systems?
The post How to forcefully renew Let’s Encrypt certificate appeared first on nixCraft.
How do I install and set up WireGuard VPN server on a Debian 10 Linux server? How can I configure Debian 10 as the WireGuard VPN server?
The post Debian 10 set up WireGuard VPN server appeared first on nixCraft.
I am a new Ubuntu Linux 20.04 LTS server system administrator. How can I set up an OpenVPN Server on an Ubuntu Linux version 20.04 LTS server to shield my browsing activity from bad guys on public Wi-Fi, encrypt all traffic while connecting to 4G LTE network, and more?
The post Ubuntu 20.04 LTS Set Up OpenVPN Server In 5 Minutes appeared first on nixCraft.
How can I install and set up WireGuard VPN server on an Ubuntu 20.4 LTS Linux server? How do I configure Ubuntu 20.04 as the WireGuard VPN server?
The post Ubuntu 20.04 set up WireGuard VPN server appeared first on nixCraft.
The post CentOS 8 set up WireGuard VPN server appeared first on nixCraft.
The post CentOS 8 Set Up OpenVPN Server In 5 Minutes appeared first on nixCraft.
How do I install Tinc and Set Up a Basic VPN on Ubuntu Linux 18.04/20.04 LTS server?
The post Ubuntu Install Tinc and Set Up a Basic VPN appeared first on nixCraft.
I am a new Debian Linux 10 server user. How do I set up an OpenVPN Server on Debian Linux version 10 server to shield my browsing activity from bad guys on public Wi-Fi, and more?
The post Debian 10 Set Up OpenVPN Server In 5 Minutes appeared first on nixCraft.
I am a new RHEL 8 server sysadmin. How do I configure SSH public key-based authentication for RHEL (Red Hat Enterprise Linux) 8 server?
The post How To Set Up SSH Keys on RHEL 8 appeared first on nixCraft.
