101Linux
Docker – quick introduction. Part 2
In part 1 of this series, we saw how to pull Docker images from Docker Hub and launch Docker containers. We interacted with a running Docker container by running som
5 min read↗
THE FIELD NOTES
The journal.
Practical knowledge, one discovery at a time.
171 ARTICLES
102Linux
man page for crontab schedule format
The scheduling format for the Linux scheduling daemon cron are not easy to remember, especially if you don't work with cron that frequently. The first reaction for m
2 min read↗
103Linux
chown symbolic link
One of the most commonly used Linux system administration tools is chown, which is part of the coreutils package. It is used to change the user and/or group ownershi
2 min read↗
104Linux
Record ssh session using screen
Per the man page - "Screen is a full-screen window manager that multiplexes a physical terminal between several processes (typically interactive shells)". Screen is
3 min read↗
105Linux
shuffle files in a directory with python
I have a playlist file which contains audio files to play. The audio player unfortunately plays the music files in a sequential order, in whatever order they are lis
2 min read↗
106Linux
ngrep – insecure connections your browser is making
Ngrep is a very user friendly packet sniffer, basically the "grep" equivalent at the network layer.
2 min read↗
Find Internet Service Providers in your area
How to locate broadband Internet service providers in your area.
3 min read↗
108Linux
Block all users from logging in to a system except for root
In some cases, you might want to block all users from logging in to the system or just after you login, you want to prevent everyone else from connecting to the serv
1 min read↗
109Linux
How to stop showing login messages
During user login, a Linux box might show message of the day(motd), new email, or package updates information. This is particularly common in Ubuntu boxes. In some c
1 min read↗
110Linux
httpie – to curl or not to curl
Curl is the defacto CLI tool for interacting with web services and other non-HTTP services such as FTP or LDAP. Linux or Unix system administrators as well as develo
3 min read↗