Question 121970 in Redis Question posted in
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Redis – How to overwrite multiple outputted lines from a bash script into the terminal

I have a kubernetes command kubectl get pods which prints to the terminal this output

 NAME                          READY   STATUS    RESTARTS   AGE
redis-cart-74594bd569-ffrhk   1/1     Running   0          40m

I want this command to run repeatedly every two seconds in a bash script.
However, I want the output to overwrite the last input.

Currently, I can get it to overwrite one line (the first outputted line) by using a carriage return. But it doesn’t overwrite the second line.

How can I overwrite previously outputted text from my bash script?

By script looks like this atm

#!/bin/bash

variable=$(kubectl get pods)

while true
do
    variable=$(kubectl get pods)
    echo -ne "$variable" "r"
    sleep 2
done
exit
Tags:

2

Answers


  1. 0

    Add clear command to the loop:

    #!/bin/bash

variable=$(kubectl get pods)

while true
do
    variable=$(kubectl get pods)
    clear
    echo -ne "$variable" "r"
    sleep 2
done

    But, you can use watch or -w to get a similar result without a special script.

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  2. 0

    try watchto refresh output …

    watch kubectl get pods

    To end the process you can use CTRL+C or look for the process via ps or pgrepand send a SIGINT like pgrep watch kubectl | xargs kill -1.

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