Linux

yum Command: List The Contents (Files) Of A Package

by on November 17, 2012 · 1 comment

The rpm -qi command list the files of a package. How do I use yum command to list the contents of a package under CentOS or RHEL installed on IBM server hardware?

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Linux / Unix: Sed / Grep / Awk Print Lines If It Got 3 Words Only

by on November 9, 2012 · 2 comments

I have a sample data file:


This is a test.
Unix is Best.
No Linux is the Best.
Space in simple understanding is an area or volume.
Outer space .

I need the output:

Unix is Best.
Outer space .

How do I print all lines that have three (3) words only?

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Linux / Unix: Rsync Copy Hidden Dot Files and Directories Only

by on November 9, 2012 · 4 comments

How do I use the rsync tool to copy only the hidden files and directory (such as ~/.ssh/, ~/.foo, and so on) from /home/jobs directory to the /mnt/usb directory under Unix like operating system?

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Bash Check If Shell Is Interactive or Not Under Linux / Unix Oses

by on November 5, 2012 · 3 comments

How do I check in GNU/Bash if a shell is running in interactive mode or not while writing shell scripts?

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HowTo: Speedup ping and traceroute Command Responses under Linux / Unix

by on October 31, 2012 · 1 comment


The following question was asked in the Unix networking exam:

How do you speed up ping and traceroute command responses under Unix or Linux operating systems?

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Grep Include Only *.txt File Pattern When Running Recursive Mode

by on October 25, 2012 · 8 comments

I‘m using Debian Linux as my development workstation. I would like to search a directory called ~/projects/ recursively for “foo” word only for *.txt files. How do I search all text files in ~/projects/ for “foo” word using grep command?

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Linux dd Command Show Progress Copy Bar With Status

by on October 20, 2012 · 4 comments

I‘m using dd command for block level copy and just found out that there’s no built in way to check the progress. How do I use the Linux or Unix dd command while coping /dev/sda to /deb/sdb and display a progress bar when data goes through a pipe?

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