FAQ

Linux: Start Command In Background

by on March 19, 2013 · 1 comment

I am a new Linux command line user. How do I start or run command in the background so that I can access command prompt immediately?

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Awk Find And Replace Fields Values

by on November 26, 2012 · 1 comment

I have a data as follows :

foo bar 12,300.50
foo bar 2,300.50
abc xyz 1,22,300.50

How do I replace all , from 3rd field using awk and pass output to bc -l in the following format to get sum of all numbers:
12300.50+2300.50+1,22,300.50

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Linux / Unix: curl Command Pass Host Headers

by on October 31, 2012 · 3 comments

How do I send a header to my Web server (such as Nginx / Lighttpd / Apache / ISS) on a Apple OS X or Unix or Linux based system using a curl command line option for testing and debugging my web apps or server nodes behind a load balancer?

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wget Command: Download Compressed File By Sending gzip Headers

by on October 28, 2012 · 0 comments

I have turned on gzip compression as modern web browser supports and accepts compressed data transfer. However, I’m unable to do so with the wget command. How do I force wget to download file using gzip encoding?

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Linux AWS: Find And Delete All Files Securely So That No One Can Recover It Ever

by on October 25, 2012 · 6 comments

I‘m currently using Amazon EBS block level storage volumes for use with Amazon EC2 instances powered by Red Hat Enterprise Linux. This volume stores critical webapp and user data. We are moving out to another cloud provider. How do I find files such as *.logs, *.php, *.gz and few other file patterns and securely delete them so that no one can recover it ever?

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Linux / Unix: Find Out DNS Server IP Address / Names

by on October 3, 2012 · 6 comments

How do I find out my DNS server IP address assiged my my ISP under Unix or Linux operating system using command prompt? How do I find preferred dns server under Debian / Ubuntu / Fedora Linux desktop system?

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Linux: warning: CUPSEXT could not be loaded. Please check HPLIP installation.

by on September 29, 2012 · 2 comments

I‘m trying to install latest version of Hewlett-Packard’s Linux Imaging and Printing software (HPLIP) for my office jet printer. In order to install latest version of HPLIP I removed the hplip-gui, hplip, hplip-cups, hplip-data, hpijs, and hpijs-ppds Debian Linux packages However, I’m getting the following error:

Debian warning: CUPSEXT could not be loaded. Please check HPLIP installation.



How do I fix this error while installing hplip-3.12.9.run under Debian Linux 6.0.5 amd64 bit?

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