Monitor Linux CPU temperature, frequency, power in a graphical way

last updated in Categories Command Line Hacks, Howto, Python

S-tui is a free and open source terminal UI for monitoring your computer. s-tui allows to monitor CPU temperature, frequency, power and utilization in a graphical way from the terminal. It is written in Python and need root permission to use the s-tui. It is useful for:

  1. Watch your CPU temperature/utilization/frequency/power
  2. See performance dips caused by thermal throttling
  3. No need to use X-server. Perfect for headless usage including Raspberry PI

Let us see how to install and use s-tui on a Linux based system.

Improve your bash/sh shell script with ShellCheck lint script analysis tool

last updated in Categories Command Line Hacks, Howto, Programming

ShellCheck is a static analysis tool for shell scripts. One can use it to finds bugs in your shell scripts. It is written in Haskell. You can find warnings and suggestions for bash/sh shell scripts with this tool. Let us see how to install and use ShellCheck on a Linux or Unix-like system to enhance your shell scripts, avoid errors and productivity.

How to colorizing cat command output or files using ccat app on Linux or Unix system

last updated in Categories Command Line Hacks, Howto

The cat command (short for concatenate) is one of the most frequently used flexible commands on Linux, Apple MacOS X, *BSD (FreeBSD / OpenBSD / NetBSD), Unix-like operating systems. It is useful to display text files on screen, copy text files, combine text files, create new text files and more. If you cat command with colours, try ccat app.

I put a cronjob in /etc/cron.{hourly,daily,weekly,monthly} and it does not run and how can I troubleshoot it?

last updated in Categories Cloud Computing, Howto, Open Source, Web Developer

Recently I created a simple shell script called in /root/scripts directory to just backup MySQL database and dumped it to /nfs/mysql/ directory. I put a file (more like used the ln command to create a soft link ) in /etc/cron.hourly/ and it doesn’t run. There was no error in systemd log or cron log. Why is my cron job was not working, and here is how I troubleshoot it.