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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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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? A2 Q3 How will you read the file and then write to another file with CSV data in different order? … Read more ›...

SSH Login without password so that tasks can be automated via shell scripts


If “openssh-server” & “openssh-client” are not installed in say “hostA”, then install them in “hostA” using “apt-get” with “sudo” for actions with root user privileges.

Setting up passwordless connection

The aim is to connect from “hostA”

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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 Q2 How will you copy files from a remote server to a local server? … Read more ›...

Unix Sed commands for Java developers

sed (stream editor) is one of the powerful workhorse commands in UNIX. Recently I had to use it with “Git” and “Maven” to find text “SNAPSHOT” in all pom.xml files, and manually update them with a realease version like 1.0.2 without the suffix “SNAPSHOT”.

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Unix shell script to upload & download data between HDFS and edge node

In BigData projects relating to HDFS or AWS S3, it is common to have scripts that transfer or download data from HDFS to the local file system on an edge or gateway node with CLI commands like HDFS, AWS, etc. You also need to upload files from a local file...

Unix tutorial with MobaXterm

Many industrial Java applications are developed om a WIN32 platfor, but run on a target platform, which is Unix based. If you are a beginner to Unix, and would like to work on an emulator that runs on a Win32 platform, this post is for you. MobaXterm is a set...

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