81Linux
Install free ssl certificates in Ubuntu
Free SSL certificates with Let's Encrypt certbot - tested in Ubuntu 14.04 with Apache 2.
4 min read↗
THE FIELD NOTES
The journal.
Practical knowledge, one discovery at a time.
171 ARTICLES
82Linux
Cloud service providers IP ranges – AWS, Azure and GCP
Cloud service providers IP ranges for Amazon Web Services(AWS), Microsoft Azure and Google Cloud Platform(GCP).
21 min read↗
83Linux
How do I view Linux kernel configuration?
Linux kernel - check the kernel options enabled during kernel compilation.
1 min read↗
84Linux
curl – show only http response code
Most browsers have developer plugins where you can see the HTTP status code response and other request/response headers. For automation purposes though, you are most
3 min read↗
85Linux
Linux share terminal in real time
How to share your terminal session with another user in real time.
2 min read↗
86Linux
Linux restricting user access
1. With the chage command, an account expiration can be set. Once that date is reached, the user cannot log into the system interactively. Let us run 'chage' interac
2 min read↗
87Linux
Sort IP addresses numerically
A novice user's first attempt to sort a list of IP addresses would be to use 'sort -n', that is a numeric-sort option for sort command. Unfortunately, this will sort
2 min read↗
88Linux
Setup your own self signed Certificate Authority (CA)
How to be your own Certificate Authority(CA) with self signed certificates
3 min read↗
89Linux
Server refused to allocate pty
Server refused to allocate pty : pseudoterminal in use reached maximum allowed limit.
2 min read↗
90Linux
AIDE installation and setup
AIDE is a host-based file and directory integrity checking tool, similar to Tripwire. It creates a snapshot of file details during initialization and stores them in
1 min read↗