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Can a bash script wait for a key to be pressed?
We can take input in bash script by using various types of options with the read command. Sometimes we need to write the script in such a way that the script will run until a specific key is pressed or the particular script will execute based on the specific key or the program will wait for the specific amount of time until any key is pressed.
How to run bash script with infinite while loop?
Run the script. Create a bash file with the following script. An infinite while loop is used in this example that will terminate when the user will press ‘q’. If the user presses any key without ‘q’ then the value of the counter variable will be increased by 1 and print the value. Run the script.
What happens when you press 3 in Bash?
If the user presses ‘1’ then it will add two command line arguments and print. If the user presses ‘2’ then it will subtract two command line arguments and print. The script will run continuously until the user presses ‘3’. echo “1.
How to end infinite loop with any key pressed?
#!/bin/bash count=0 while : ; do # dummy action echo -n “$a ” let “a+=1” # detect any key press read -n 1 keypress echo $keypress done echo “Thanks for using this script.” exit 0 You need to put the standard input in non-blocking mode. Here is an example that works:
How to pause a bash script without an argument?
You’ll want to use the wait command to do this for you. You can either capture all of the children process IDs and wait for them specifically, or if they are the only background processes your script is creating, you can just call wait without an argument. For example:
What to do with network statistics in Bash?
The above command (Network statistics) give the connection info and their state The above command (domain information grouper) query the DNS related information The above command query the DNS and find out the IP address of corresponding the website name. The above command is used to check the Netwrok route information.
What happens when you wait between two for loops in Bash?
Because of the point above, with or without nohup, a simple wait between the two for loops will cause the second for to be executed only after all child processes started by the first for have exited. all currently active child processes are waited for, and the return status is zero.