tcpdump – capture output in real time
tcpdump - how to grep or save output in real time Tcpdump is a handy tool for capturing…
Redhat satellite / Spacewalk – automatically patch clients
Redhat satellite or Spacewalk - real time push to clients. By default, a client waits for a set…
Logical volume management – shrink an LVM
Reduce or shrink the size of non root LVM mount. In a system with limited disk size, you…
SSL certificate expiration date for a site or domain
When will the SSL certificate for a site expire or in how many days will an SSL certificate…
Posted inLinux Miscellaneous
yum : show all yum directives
yum - dump all yum repos configuration directives Per the man page, the yum-config-manager is "a program that…
Posted inContainers How tos Linux
Docker – quick introduction. Part 2
In part 1 of this series, we saw how to pull Docker images from Docker Hub and launch…
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…
chown symbolic link
One of the most commonly used Linux system administration tools is chown, which is part of the coreutils…
Record ssh session using screen
How to record your ssh session using screen. Per the man page - "Screen is a full-screen window…
shuffle files in a directory with python
Randomly ordering files in a directory with python I have a playlist file which contains audio files to…