Tag: bash

Swap Two Characters in BASH In BASH, we can use “${#string}” to get the length of a string. And in a function, we use “local” keyword to declare local …

I have quite a few servers, and deploying same files/folders to them is a problem. Then I come up with the following BASH script where I can just run …

Disk high usage are one of the common cause of server down. Some administrators would create a 8GB empty file, and once the disk usage is exceeding a threshold, …

We can write a BASH Script to print out the current CPU frequency and temperature on Raspberry PI. #pi@raspberrypi:~ $ cat ./cpu_freq.sh #!/bin/bash temp=`head -n 1 /sys/class/thermal/thermal_zone0/temp | xargs …

You are given a lowercase alphabet string text. Return a new string where every character in text is mapped to its reverse in the alphabet, so that a becomes …