The whole process took just 3 weeks.
1st round - phone screen - behavioral (30mins), ~12 one line questions from topics like windows file system ( ex: "do you by chance know what NFS means and what happens if the inode is full?"), DNS(types and how the Internet works) TCP, UDP, SQL aggregate and join functions, AWS EC2 and lambda.
2nd round - behavioral + given log file how you output avg of two files(string question), max length of concatenated string
3rd round - behavioral+ shell scripts (regex pattern matching, combined Linux commands like grep, awk, find, questions like find top 10 recent log files and add date to their prefix)
4th round - behavioral+ explain automation you did in your resume( explained a shell script I worked on which pools data from Oracle using MySQL and send the results to the table by scheduling a cron job)
5th round - behavioral+ troubleshooting questions like ( what will you do when the site is down ,dive deep), what are the requirements when you are deploying a new software for a client