What is the ASCII Code? ASCII (ASS-kee) abbreviated from American Standard Code for Information Interchange, is a character encoding standard for electronic communication. ASCII codes represent text in computers, telecommunications equipment, and other devices. Most modern character-encoding schemes are based on ASCII, although they support many additional characters. More details you can find out in…
Split String with a Delimiter in Shell Script You can use Internal Field Separator (IFS) variable in shell script to split string into array. When we set IFS variable then the assignment to IFS only takes place to that single command’s environment to read. It then parses the input according to the IFS variable value…
How to validate date format in shell script There are multiple ways you can validate date format in shell script. You can compare date format with regular expression or you can use inbuilt date command to check given date format is valid or not. I am sharing a simple date command to validate the date…
Loop through a date range in Shell Script Here is a simple shell script which accept two date value as argument and perform desired action for date value in loop.daterange.sh #!/usr/bin/bash start=$1 end=$2 start=$(date -d $start +%Y%m%d) end=$(date -d $end +%Y%m%d) while [[ $start -le $end ]] do echo $start start=$(date -d”$start + 1 day”…
Pass date as mandatory arguments in bash script I came across a use case where I have to write a shell script to perform some action on two date ranges. The first argument would start date and the second argument as end date. To validate missing argument we can also check $1 and $2 null…
How to define multiline string variable in shell? In your bash/shell scripting experience you may face scenario where you need to define multi line string variable. Here is multiple ways to define multi line string variable in shell. Method 1: Combine Multiline with \n like below and echo with -e option method1=”This is line no.1\nThis…
How to read a config file in Python: This article will help you to read config based on the environment. For example, If you have a python script which uses different database config for UAT and PROD. [PROD] host = “192.168.0.1” port = “12345” user = “PROD_SCHEMA” password = “Pwd1” service = “service_prd.service.com” [UAT] host…
If you working as a Linux administrator or as a DevOps engineer then you might get a use case where you need to run multiple bash scripts in parallel without waiting to finish execution of previous script. Let me show you possible ways to achieve this in bash script For e.g I have 5 bash…
Shell script to get the last 10 weekdays and run some task for each date over an element array. #!/usr/bin/bash n=10 today=$(date +’%Y-%m-%d’) for ((d=1; n>0; d++)) do # Adjust this next line to get the date format you require, e.g. +’%Y%m%d’ date=$(date –date “$today -$d day”) nday=$(date –date “$today -$d day” +’%w’) weekdays_date=$(date –date…
What is Site Reliability Engineer (SRE) Role? Site Reliability Engineering (SRE) is a discipline that incorporates aspects of software engineering and applies them to infrastructure and operations problems. The main goals are to create reliable, efficient, and scalable software systems. According to Ben Treynor, founder of Google‘s Site Reliability Team, SRE is “what happens when…
