top-like tools on Linux for network

ByQ A Mar 24, 2018

How to display the network usage by processes like top for CPU/mem on Linux?

The nethogs tool is my favorite:

nethogs – Net top tool grouping bandwidth per process

QA

Which ssh client on iOS works the best for socks?
ByEric Ma Mar 24, 2018Mar 11, 2019

There are good ssh clients on Windows and, needless to mention, Linux. But which ssh client on iOS for iPhone/iPad works the best for socks? You may try vSSH. It is the best SSH client app I found on iOS. vSSH supports tunneling/port forwarding: you can setup port tunneling in the “Port forwarding” section of…

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QA

How to get the script’s own path in sourced Bash script?
ByEric Ma Mar 24, 2018Mar 24, 2018

In normal Bash script, $0 is the path to the script. However, when a script is sourced, such as . a.sh a.sh’s $0 does not give a.sh. How to get the a.sh inside a.sh? Short answer: use ${BASH_SOURCE[0]}. You can check this post for details and explanations: How to Get Bash Script’s Own Path. Read…

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Tutorial

5 necessary PC hardware that a programmer needs to upgrade
ByJames Clark May 30, 2019Nov 21, 2019

The world of technology has evolved drastically over the last few decades. Almost every aspect of our lives is dominated by technology. At the heart of technology lies computer programming. Computer programming is what dictates the success of the technology. I mean think about it, your smartphone, PC, ETC they all rely on programming. This…

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Linux

Make Grub2 Boot Older Kernel Version in Ubuntu 20.04
ByDavid Yang Jun 7, 2020Nov 1, 2020

In a Linux system, we may have multiple kernels installed. Usually, it is the latest kernel configured to be the default one the system boot loader will use during automatic boot if there is no manual kernel choosing. In many cases, such as there is no driver ready yet for some devices in newer kernels,…

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QA

How to write a SQL to replace strings in a column in a MySQL database table?
ByEric Ma Mar 24, 2018Mar 24, 2018

How to replace strings in a column in a MySQL database table? For example, I would like to replace http://www.systutorials.com with https://www.systutorials.com in a content column of a table post. You may use a SQL statement as follows. update post set content = replace(content, ‘http://www.systutorials.com’, ‘https://www.systutorials.com’) where content like ‘%http://www.systutorials.com%’ Read more: HTML form generation…

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QA

How to send POST request in JavaScript?
ByEric Ma Mar 24, 2018Mar 24, 2018

How to send POST request in JavaScript from the users’ browsers? One easy method I find is to use the jQuery library’s post() method. Here is one example that send POST request with data “file: filename” to the “/fileview” URL on the server and show the replied data: $.post(“/fileview”, {file: filename}, function (data) { //…

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