Q1. What is ssh?
A1. SSH is a secure protocol used for remotely connecting to Linux servers. For example, creating an ssh connection from your local laptop to an ec2 instance running on AWS or any server on the cloud.
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12 SSH interview Q&As
14 Unix interview Q&As
Q1 How do you remove the Control-M characters from a file?
A1 Using the sed command that replaces Control-M with nothing
Note: The ^M is typed on the command line with ctrl+v and ctrl+M
Q2 How will you search for a property named “inbox”
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5 curl vs wget interview Q&As
Q1. What are the differences between curl & wget? A1. wget is a tool to download files from servers. It let’s you download files from an HTTP/HTTPS or FTP server....
Hidden Unix, Git & SVN config files
You need to use “ls -la” to list the hidden files in your home (i.e ~) directory. These config files are “.bashrc”, “.inputrc”, “.profile”, etc. In computing, a hidden folder or hidden file is a folder or file that does not display by default when showing a directory/file listing.
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sed and awk to write shell scripts for Java developers
Q. How would you go about replacing a piece of a text or a phrase from 20,000+ web templates residing on a Unix file system? Even some candidates with 5+...
Shell script interview Q&As for Java developers
Q1 How will you go about reading a CSV file as shown below? A1 Q2 How will you read and then write to another file? … Read more ›...
Top 10 Linux interview Q&As
Many production systems run on Linux systems, especially the Cloud infrastructure (i.e. AWS & GCP). Even Android uses the Linux kernel under the hood. So, it really pays to have...
Unix – combining two or more files & output only a subset of columns
Unix is a very powerful tool to automate monotonous & manual tasks. Here is a real-life example for data engineers & software engineers. If you are not familiar with Shell scripting the code may look complex,
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Unix – Convert csv to psv without removing commas within quotes
Unix is a very powerful tool to automate monotonous & manual tasks. Here is a real-life example for data engineers & software engineers. If you are not familiar with Shell scripting the code may look complex,
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Unix – Working with SQL files
Q01 How will you go about to list all the table names used in a number of sql scripts for a given database say MY_DB_1?
A01 Let’s say you have a number of sample sql scripts like
test.sql:
test2.sql:
Output_table_names_used_in_scripts.sh
Output.txt
Q02 How will you go about replacing the database name MY_DB_1 in the *.sql above to use MY_NEW_DEV_DB ?
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