Lynxbee

How to fix wordpress pages / posts 404 error OR How to fix “404 Not Found error was encountered while trying to use an ErrorDocument to handle the request”

If by some reason you are not able to access your wordpress based websites pages / posts and you are getting an error like, “Not Found” “The requested URL /page_or_post_name/ was not found on this server.” “Additionally, a 404 Not Found error was encountered...Read More

Compiling css-optimizer using Maven and optimising css scripts to remove unused code

$ sudo apt install maven $ git clone https://github.com/thoqbk/css-optimizer.git $ cd css-optimizer $ mvn package This will compile and install java jar library at target/css-optimizer-0.1-SNAPSHOT.jar Now you can run the already existed test example as, $ mvn test...Read More

How to add a website to google search console / webmaster

Have a new website and you would like google to add your pages into its search so anyone can search in google and reach to your website, the first step is to make sure you have added your website to google search console /...Read More

Moving wordpress based website from http to secure https after installing SSL certificate

As you might be knowing google considers http and https websites as two different websites while ranking, hence its always better to have SSL certificate installed as early as possible to your website so that you may not loose the google rankings. To install...Read More

How to capture and analyse network packets using tcpdump and tshark at commandline

We can use tcpdump to capture the packets whereas tshark to analyse the packets. $ tcpdump --help tcpdump version 4.9.2 libpcap version 1.7.4 OpenSSL 1.0.2g 1 Mar 2016 Usage: tcpdump [-aAbdDefhHIJKlLnNOpqStuUvxX#] [ -B size ] [ -c count ] [ -C file_size ] [...Read More

How to encrypt directory / folder in Linux using Encfs – Ubuntu 16.04

EncFS creates a virtual encrypted filesystem which stores encrypted data in the rootdir directory and makes the unencrypted data visible at the mountPoint directory. The user must supply a password which is used to (indirectly) encrypt both filenames and file contents. $ sudo apt...Read More

How to block unwanted websites using your router in a home wifi network

If you are concerned about your family members like childs coming across any unwanted website unexpectdly while browsing, its always better to follow certain methods to block such kind of websites in advance. One way of blocking this kind of websites is to use...Read More

Shell script / commands to extract only certain files / folders from specific compressed tar file

How to invoke OOM Killer manually for understanding which process gets killed first

As we have seen in our previous post “Understanding Linux OOM Killer and avoiding perticular process from being killed in case of Out of Memory” process which consumes more memory and this has more oom_score becomes the most probable process which gets killed first...Read More

Measuring networking performance or benchmarking networks using Netperf ( Compilation using source code )

Netperf is a benchmark that can be used to measure various aspects of networking performance. Its primary focus is on bulk data transfer and request/response performance using either TCP or UDP and the Berkeley Sockets interface. There are optional tests available to measure the...Read More