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 …
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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
1 | sed 's/^M//g' ReadWriteFile. |
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. You …
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 …
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+ years …
Shell script interview Q&As for Java developers
Q1 How will you go about reading a CSV file as shown below?
1 2 3 4 5 6 | Portfolio,Account,PositionIndicator, |
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 a …
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 …
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 …
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 …
Unix history commands for Java developer productivity
When you are using Linux/Unix command line frequently, using the history effectively can be a major productivity boost. You can accomplish things with less typing. For example, you will be typing …
Unix remoting interview Q&A for Java developers
Q1 How will you delete files that are older than 7 days in a remote unix server? A1 By ssh ing to the remote host server
…
Unix sed & awk commands in action
This extends sed and awk to write shell scripts for Java developers. sed & awk are very powerful tool for data engineers to transform text files. Here are a few examples. …
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